100% Repair Of Laptop & Desktop Motherboard

100% Repair Of Laptop & Desktop Motherboard
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pafa

Joined: 23 Feb 2007
Posts: 5

09 Nov 2007 13:42 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip, My Toshiba laptop mod no. Satellite P25-S5093 has developed a fault. On bootup i get a message on screen of "media test failure check cable" and "exiting PXE ROM" Any ideas as to what this may be. Thanking you PAFA

VSMVDD

Joined: 12 Jun 2005
Posts: 567
Helped: 55

12 Nov 2007 14:08 Re: blue screen with P III when XP is used.

pafa wrote:

you need to start windows using a boot cd or ntsc{winxp etc} boot cd
you can find on the net iso images for making one

then edit the config.sys and remove the driver for the network card something installs

or.... you can hold down shift as the machine boots and this will stop the driver trying to load

or press F8 and choose safe mode then edit the config.sys or remove the lan card driver when windows boots

problem solved

Added after 6 minutes:

jeycee00 wrote:

Hello!

I have an IBM R40 that I removed the LCD of and used as a kind of desktop system. I connect the display (VGA-OUT) to a monitor. Then out of the blue, the unit shut down. When I tried to reboot, no display came out. I tried replacing the mem. No success. There were times that the display would return, only for the computer to hang in windows with the slightest nudge of the unit.

Also, at times that no display came out, it would give off a beep. Beeeep, beep, beep, beep (translated: One medium beep, 3 short beeps). Can you tell me what the problem is and a possible remedy? Thanks!

i think you have a loose video socket or a componenet near it has a bad joint

you need to strip the motherboard out the machine and look around it for issues near to the video
beeeeep bep bep bep is the post test error code for video cards not there
you get the same one if you uplug the video card from any pc
most laptops use a vram socketed card as the memory for the video system
and this can also work loose {sometimes under a flap on the bottom}

some machines whole video section is on a riser card and again check this hasnt become unplugged from the main board

also i see you remove the lcd so check for a dropped screw etc
or a fix in the board from a drop or bump

Added after 3 minutes:

palesha wrote:

I hv sony viao laptop. It works on mains but not working on battery. The battery is not detected & charged.
Battery is ok.
I tried with 2 people but they failed.

an internal smd fuse has failed its on the board that connects to the battery pak inside

youll see its a 15mm square ceramic smd fuse i think 2.5amps

sometimes they get week if you use the machine for a long time at a time and when the cell is a little tired thats been used before and then replaced weekens it

Added after 8 minutes:

prashar wrote:

Hi Sandip, This is Prashant bhavsar,I have P III VIA mother board.I used to use 64MB X2=128 MB RAM in two banks.With this WIN98 was working OK.And with XP pro or win2000 it was working OK for some time(the time is not fixed) after that it was giving blue screen (BSOD?)and u have to reset the PC.Some times it gave problem of this blue screen at the time of booting also.
I bought a new RAM ( 128MB)and tried it in both slots,the problem is still there.I am forced to use win98.Where can the problem be?
Prash. prashsar(at)yahoo.co.in

maybe your cpu needs some new heatsink paste as it dries up with time and dosnt work so well
psu can be an issue as xp needs more current in most systems
or most often
you need to change the ide cable to a udma cable and make sure its plugged in properly blue to board black to the drive white in the middle to the slave

then you need to install the main board makers!!! version
of the via chipset drivers
early version of windows xp had issues with via support for large drives and partition over the network
and for this reason most p3 will crash intermitenlty
once this step is done
install windows xp sp2 service pak
and any hot fixes
new drivers for the video etc
if you use a soundblaster card / ati etc video
you can use driver cleaner pro to remove these and install the makers drivers

sibilious

Joined: 15 Feb 2007
Posts: 1

15 Nov 2007 1:09 Re: 100% Repair Of Laptop & Desktop Motherboard

Hy there you Electronics Heavy weights, I am having this problem with Toshiba PSC-R10 which says"Protection System Failure" on boot up with Password on the next line, the customer said that he never setup a password .I did some digging and found out that password was contain on small 24C02, I removed an equivalent smd 2402 eeprom and dumped the contents but nothing found interesting in the dump. The laptop seemingly is using M306K9FCLRP advanced Microcontroller to prtotection system. Any help would be appreciated.

kavi

Joined: 21 Nov 2007
Posts: 1

21 Nov 2007 1:13 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi, I have a packard bell easynote R4345W, the mother board refuses to power on.Led is not lit on.
The on switch and fuses are ok,charger is ok,but a part "U13" , its number probably is AM 51137 or AM51117 heats up. Please help me to find the bad component.

VSMVDD

Joined: 12 Jun 2005
Posts: 567
Helped: 55

22 Nov 2007 23:12 Re: 100% Repair Of Laptop & Desktop Motherboard

kavi wrote:

i think you just did find the bad component try isolating its vdd supply pins and see if the board powers

Added after 3 minutes:

sibilious wrote:

did you try to just press enter at this point
once you restore the chip to its place

i think if there is no password set then this is null string and will still ask for the password till you indeed press enter then enter is used and the null ends on next boot??? just an idea but one to try
not sure what to add .. other than maybe return to toshiba or phone them

santapg

Joined: 24 Dec 2006
Posts: 18

23 Nov 2007 10:52 Protection System Failure

Media failure is generally due to hdd failure....pls use your windows recovery cd and try if the problem still remains you need to change the HDD.

Sandip Golani
[/img]

Added after 2 minutes:

This is due to password set in the laptop if you have ROM programmer use it to flush and refit the ROM chip to the board. thats all.

Sandip Golani

nnbk_eda

Joined: 08 Nov 2007
Posts: 4

24 Nov 2007 17:52 Re: blue screen with P III when XP is used.

[quote="prashar"]Hi Sandip, This is Prashant bhavsar,I have P III VIA mother board.I used to use 64MB X2=128 MB RAM in two banks.With this WIN98 was working OK.And with XP pro or win2000 it was working OK for some time(the time is not fixed) after that it was giving blue screen (BSOD?)and u have to reset the PC.Some times it gave problem of this blue screen at the time of booting also.
I bought a new RAM ( 128MB)and tried it in both slots,the problem is still there.I am forced to use win98.Where can the problem be?
Prash. prashsar(at)yahoo.co.in[/quo

some hardware drivers is uncorrect

santapg

Joined: 24 Dec 2006
Posts: 18

03 Dec 2007 11:03 Hi Prashant

Nice to have a telephinic Chat and also to recive your pc problem ...its RAM problem hope so....specially the speed of the RAM is not matching The RAM u r purchasing these days are all 133 Mhz, where as u r RAM which is installed is either 66 or 100 Mhz.... more over increase the RAM size also to 256 MB

Thanks

Sandip Golani

syam_k_g

Joined: 25 Sep 2006
Posts: 11

06 Dec 2007 7:06 Hi Sandip

I got Sony VAIO PCG-K86P laptop. I have to replace my DC harness as its broken(tripped off on the power cable), I am not able to reach the three screws under the Lid(LCD screen), Can you tell how to open the laptop to replace the DC harness.

Another thing is DVD ROM drive doesnt eject in both ways(pressing the eject button or right click-> eject on the drive in my computer). I hve to pull it out carefully after pressing the button(I have tried with pressing with pin in the small hole also)

Can you please tell me how to solve these probs, ThanQ

VSMVDD

Joined: 12 Jun 2005
Posts: 567
Helped: 55

07 Dec 2007 16:20 Re: 100% Repair Of Laptop & Desktop Motherboard

you need to use a magnetic screw driver
to get at the screws for the screen take the two screws from the side of the
panel where the power buttons are at the left hand side
now slide it to the left and take it off
rest is easy but dont forget to disconnect the lcd carefully
also i have a dvd drive and also a lcd sreen for this model if you need them or cant find parts
if you have this dvd problem its usualy a small spring come adrift that gently pushes out the drawer
you need to take it appart and give it a service see whats wrong

as for windows Xp etc this error is caused by the type of dma cable your using
at some time you replaced the drive

also you may need to update your bios to the latest one
any partitions on the drive can cause issues with this windows driver
as there were issues with sp1 winxp and win2000 with older large fat type partions.

ram of 128mb even is enough to run it stable
rame speed of 133mhz type wont bother a p3
again later bios cures this issues setting the latency to cas 2 rastocas2 and refresh 2 will cure the issue if needed becouse cas 3 133mhz ram run at 66mhz / 100mhz will be cas2
sometimes this needs set before using that ram to even boot once set its fine

sawwa7

Joined: 30 Oct 2004
Posts: 310
Helped: 30

10 Dec 2007 17:08 Re: 100% Repair Of Laptop & Desktop Motherboard

hi
i have a P4 gigabyte Mobo Model GA-G1000 with intel chips inside , this mobo was dead with no power symptom , when i heated the south-bridge chip with hotair gun , the mobo started up and asked for ram on the post tester card , and then reads ram but no data come out of the VGA card and the south-bridge chip is too hot now .. what could cause that ? and why the chip is so hot?
thanks for any help or comments
Regards

przemczan

Joined: 22 Dec 2007
Posts: 1

22 Dec 2007 12:13 Dell Inspiron 9400 - Overheating

Hi santapg,

first I want to apologize for my poor english.
Here is my problem:
I have a Dell Inspiron 9400 laptop with GeForce 7900GS graphic card. A few days ago it fall down from a table (something about 40cm height), but was still working until yesterday.
I've turned it on, but a few moments after I saw the desktop, all fans were spinning at full speed, and the temperature of GPU raised up to 96C. The CPU temp was 25C. Everest showed that GPU clock was 100MHz, and generally everything but the temp was ok. Then the laptop shuts down.

In 99.9% of cases it wont even boot up now. The power LED lights for a 1 second and the WIFI LED just blinks once for a moment.
It turned on 2 or 3 times, and even worked for a couple of minutes once, but then it was the same situation. I haven't noticed any visual defects on the motherboard or anything else. When I try to turn it on without the graphic card it seems to be ok, of course it wont boot up, but the hdd i working, the LEDs are on. One more thing: when the graphic card is pluged in the battery isn't charging, but when I remove it, its ok.

I cann't work without a computer Sad

Once again I'm sorry for my english, still learning Wink

Thanks in advance.

shahrol_hisham

Joined: 01 Aug 2002
Posts: 93
Location: malaysia

27 Dec 2007 4:30 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi santapg...

I have by the DVD R/W....brand Digital IO, The problem Is when I attach the DVD R/W drive to my pc, PC cannot recognize, no DVD R/W drive appear on my windows, how to repair this?

TQ

bwaslo

Joined: 28 Dec 2007
Posts: 3

28 Dec 2007 23:44 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip,

I feel very lucky to have your expertise available, thanks for helping all the people here.

I have a Compaq Presario V2000 CTO laptop that has numerous problems, and I also have access (for a few days) to another identical one that works fine. I'm an electronic engineer and can solder surface mount parts, but I know little about laptop circuitry and haven't been able to find a schematic to be able to troubleshoot the problems.

The bad laptop has these problems, which I think maybe related somehow:

1) it won't charge its power battery, but it does say that it is charging (in the Windows battery monitor) -- but the charge percentage never increases. The notebook will run off a charged battery and off of the AC adaptor. I put the battery into the good laptop and it charged perfectly there within a few hours, so I know the battery is actually good.

2) The internal Real Time Clock coin cell battery does not recharge in the machine, so it loses the correct date after a while. I took the cell out of the laptop and set up a charging circuit (a 3V power supply and a resistor) and it charged fine up to 2.85V, so that battery is ok, too.

3) The wireless adaptor card (a Broadcom b/g type inside the case) doesn't work, except very sporadically, after the machine has been on a few minutes. I got a new card (through eBay) and replaced it, and the new card has the exact same problem, so I think the problem is on the motherboard not the wireless card. If I use an external USB wireless adaptor, that works fine.

4) This last issue may not be related, but the LCD screen had also gone out recently (showed all colors wrong, like a negative). But I replaced that with another LCD I got from Ebay, and that now works ok.

I suspect something is wrong with the charging circuit or the switching power supply but don't know where to look on the board. The supply voltage at the wireless card is 3.30V, but there is also 5.0V on one of the pins.

Any Ideas?

Thanks

sainulabi

Joined: 06 Jan 2008
Posts: 1

06 Jan 2008 5:00 Re: 100% Repair Of Laptop & Desktop Motherboard

can u plz help me to fix a new parallel port in my motherboard ?

this is first time i am going to do this.

since an old barcode printer here has only parallel port fascility , i need to fix parallel port in my new desktop.

dk614nd

Joined: 08 Aug 2006
Posts: 153
Helped: 68

09 Jan 2008 9:28 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip

I have Intel D915GLVG mother board, i have 2 questions for you,

1) My onboard Lan Adaptor, does not work when i keep the link and speed for autodetect or 100Mbps full duplex, it works only for 10Mbps full duplex, i have alread replaced the motherboard through intel warranty scheme (due to some other problem), the new board also has the same problem, i have repartitioned, reformatted hardisc, reinstalled the OS, upgraded the bios and LAN driver, still the problem is not solved. What should i do?

2) The 915GLVG board supports PCI express, it has got a PCI express X 1 connector also, the mother board also has PCI Express x 16 connector footprint, can i mount a x16 connectotr and use it ?

regards

dk

spectrabei

Joined: 24 Aug 2007
Posts: 30
Helped: 1

09 Jan 2008 15:29 Re: 100% Repair Of Laptop & Desktop Motherboard

Quote:

I have Intel D915GLVG mother board, i have 2 questions for you,
1) My onboard Lan Adaptor, does not work when i keep the link and speed for autodetect or 100Mbps full duplex, it works only for 10Mbps full duplex, i have alread replaced the motherboard through intel warranty scheme (due to some other problem), the new board also has the same problem, i have repartitioned, reformatted hardisc, reinstalled the OS, upgraded the bios and LAN driver, still the problem is not solved. What should i do?

regards

dk

Download the LAN Driver for your particular operating system.
Link Here:

http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=2062

dk614nd

Joined: 08 Aug 2006
Posts: 153
Helped: 68

10 Jan 2008 9:23 Re: 100% Repair Of Laptop & Desktop Motherboard

I have already installed the latest LAN driver

tapas

Joined: 11 Jan 2008
Posts: 1

11 Jan 2008 18:45 Re: 100% Repair Of Laptop & Desktop Motherboard

hi sir
there is one m/b 845 intel chip set( chinesh, blue coure) there is problem it is not take ram . the debuge code is c 1, my voltage is giving 2.5 on ram slot. all voltage is ok can u give some clue , i have lots of m/ b which i couldn't repair

bwaslo

Joined: 28 Dec 2007
Posts: 3

12 Jan 2008 20:19 Re: 100% Repair Of Laptop & Desktop Motherboard

I found and fixed the problem with my Compaq V2000 laptop (the one that would not charge the battery). There is a battery monitor IC on the hard-to-get-to side of the motherboard that had failed. I found it by searching out the data sheets on various parts connecting with the battery charge region of the board until I found the right one. It was a MAX1772, and I determined that it was bad because it has a pin called "LDO" that is supposed to have 6.2V DC on it, but which had 18V on mine.

Anyway, I got one and replaced it, and it works great now. Suprisingly, the Wireless adaptor now works too, maybe the bad chip was causing one of the other voltages in the system to be out of tolerance?

The bad news (for anyone who finds this post and has the same problem) is that the chip is very small scale (25mil pin spacing) so can not be replaced without using very small-tipped soldering and unsoldering equipment (such as MetCal), not to mention somewhat advanced soldering skill.

java12

Joined: 21 Jan 2008
Posts: 2

21 Jan 2008 1:47 Re: 100% Repair Of Laptop & Desktop Motherboard

hello i am beginner in repair laptop
i want to find the answer for all this question:
# Power but no boot: Bad Input/Output controller chip, or bad video chip.
Symptoms: The LED light Turing on but the computer still doesn't boot.
in this situation what is the solution what i do for i resolve the probleme what the component electronic i will check and what chip i will change and what hardware i use for that.

# Shut down/hang when move: Open circuit, loose connection, cold solder
Symptoms: shut down when move the laptop
what i do to find what is the problme if is open circuit and what is the methode and hardawre i use to fin him

# Intermittent booting: Bad video chip, bad input/output controller chip
Symptoms: Laptop has power but gets hard to boot. If you press the power button and the central of the keyboard at the same time, laptop will boot.

# No power at all: Bad power chip, open circuit, short circuit, or loose connection.
Symptoms:Nothing showing up when you press the power button

# AC adapter turns off when plugged to the computer: Short circuit, short components
Symptoms: The LED light on the AC adapter turns off.
in this situation what is the methode to find for exemple the power transistor foulty or another component electonics

# Broken power jack: Loose connection, cold solder, broken jack
Symptoms: Need wiggle to connect, no power at all, intermittent power up

# System hangs: Bad video chip, bad hard drive controller, bad CPU controller.
Symptoms: System hangs when the windows starting, running for 5-10 minutes, or playing DVD

# No charge: Bad charging chip, bad diodes, bad inductor, bad power jack, or open circuit
Symptoms:Works with battery but it doesn't work with AC adapter, no power at all.

# Graphic Problems: Bad video chip on the board or bad LCD
Symptoms: Vertical/horizontal lines, distort color, flickering, intermittent booting

# Over heat: Bad thermal chip, bad fan
Symptoms: Restart unexpectedly, shut down randomly

# Doesn't recognize devices: Loose connection, cold solder, bad input/output controller chip set
Symptoms: doesn't recognize hard drive, USB ports, Digital card, CD ROM, PCMCIA, wireless card etc.

# Cannot go to the internet: Bad Input/output controller, bad Ethernet chip and wireless card, loose connection, cold solder
Symptoms: No Internet signal (the page cannot be displaced)
please help me for find the answer to this question
because same situation of this question it is situatioin right for me and i am finded in this situation and iam noting i do.

Added after 18 minutes:

hello i am beginner in repair laptop
i want to find the answer for all this question:
# Power but no boot: Bad Input/Output controller chip, or bad video chip.
Symptoms: The LED light Turing on but the computer still doesn't boot.
in this situation what is the solution what i do for i resolve the probleme what the component electronic i will check and what chip i will change and what hardware i use for that.

# Shut down/hang when move: Open circuit, loose connection, cold solder
Symptoms: shut down when move the laptop
what i do to find what is the problme if is open circuit and what is the methode and hardawre i use to fin him

# Intermittent booting: Bad video chip, bad input/output controller chip
Symptoms: Laptop has power but gets hard to boot. If you press the power button and the central of the keyboard at the same time, laptop will boot.

# No power at all: Bad power chip, open circuit, short circuit, or loose connection.
Symptoms:Nothing showing up when you press the power button

# AC adapter turns off when plugged to the computer: Short circuit, short components
Symptoms: The LED light on the AC adapter turns off.
in this situation what is the methode to find for exemple the power transistor foulty or another component electonics

# Broken power jack: Loose connection, cold solder, broken jack
Symptoms: Need wiggle to connect, no power at all, intermittent power up

# System hangs: Bad video chip, bad hard drive controller, bad CPU controller.
Symptoms: System hangs when the windows starting, running for 5-10 minutes, or playing DVD

# No charge: Bad charging chip, bad diodes, bad inductor, bad power jack, or open circuit
Symptoms:Works with battery but it doesn't work with AC adapter, no power at all.

# Graphic Problems: Bad video chip on the board or bad LCD
Symptoms: Vertical/horizontal lines, distort color, flickering, intermittent booting

# Over heat: Bad thermal chip, bad fan
Symptoms: Restart unexpectedly, shut down randomly

# Doesn't recognize devices: Loose connection, cold solder, bad input/output controller chip set
Symptoms: doesn't recognize hard drive, USB ports, Digital card, CD ROM, PCMCIA, wireless card etc.

# Cannot go to the internet: Bad Input/output controller, bad Ethernet chip and wireless card, loose connection, cold solder
Symptoms: No Internet signal (the page cannot be displaced)
please help me for find the answer to this question
because same situation of this question it is situatioin right for me and i am finded in this situation and iam noting i do.

fcunnin1

Joined: 29 Feb 2008
Posts: 1

29 Feb 2008 12:21 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip,
I have a Packard Bell Easynote E2316, running with a Insyde Mobile Pro Biosver 4.00.00. On power up the screen will freeze with "checksum invalid - run scu " it attempts to load the scu facility but hangs ? This is even the case when the machine is stripped down to bare bones, no hdd, no cd-rom, no mem, no network card etc. Attempting to boot from Packard bell's own cd bios update disc , or in factany disc fails, the machines lights indicate that it's attempting to read the disc but nothing works. The motherboard has PWA - Lynx_B_DC2/M BD printed on it, I can't even identify a bios chip on the board any help would be much appreciated.

abc_sk2002

Joined: 07 Apr 2008
Posts: 1

07 Apr 2008 5:52 Re: 100% Repair Of Laptop & Desktop Motherboard

Hello,

The head of audio jack is broken inside the line-in port of the motherboard and to remove it with a forshape it has gone further inside. The result is that now a new jack is going perfectly inside, but no audio is coming out to speakers and no audio is going in. The mother board is intel D845GBV2. Is it possible to remove the broken piece by desoldering complete audio port unit from the mother board and putting it back again to get audio functionalities? I have all these equipments to do this, but I will be doing this for the first time. So I need a expert's advise.

Regards.

jrguy8

Joined: 06 Apr 2008
Posts: 34
Helped: 2

07 Apr 2008 9:37 Re: 100% Repair Of Laptop & Desktop Motherboard

hi sandip,

i have an ecs lga775 motherboard. my problem is it boots normally but it doesn't go further to the windows desktop, it shuts down during or sometimes after the windows startup screen. i think it approximately shuts down after 1 minute.
please help. thanks.

dk614nd

Joined: 08 Aug 2006
Posts: 153
Helped: 68

15 Apr 2008 7:15 Re: 100% Repair Of Laptop & Desktop Motherboard

jrguy8 wrote:

change ur ram

jrguy8

Joined: 06 Apr 2008
Posts: 34
Helped: 2

15 Apr 2008 14:48 Re: 100% Repair Of Laptop & Desktop Motherboard

thanks. i'll try that

tuan2

Joined: 16 Apr 2008
Posts: 1

16 Apr 2008 16:51 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip,

My name is Tony, I have a Dell dimension 4600. It had a dead power supply 6 months ago so I replace it with a cheap PS. Now its dead again but the PS is still good (check it in another system). The computer won't POST- there're 4 diagnostic lights in the back and they won't light up-pre POST error.
I took everything off even the CPU and the PS fan won't even spin?

Can you tell me where to start troubleshoot?

Thanks.

santapg wrote:

Hi! I am Sandip Golani engaged in chip-level repairing of Laptop & desktop motherboard, If Any one of u have any problem, Pls. Place u r question in the forum, I will reply over here. I am Ready to share my 15 years experiance with EDAboard.com. My Website Address Is www.compudrivesystem.com.

abdsmith786

Joined: 17 Apr 2008
Posts: 1

17 Apr 2008 2:55 100% Repair Of Laptop & Desktop Motherboard

Hi,
I am looking for an user guide for a dv7000 camcorder can anyone help?

wolly

Joined: 08 Mar 2006
Posts: 58
Helped: 8

18 Apr 2008 3:10 100% Repair Of Laptop & Desktop Motherboard

why no replies from sandip??

syam_k_g

Joined: 25 Sep 2006
Posts: 11

07 Jul 2008 2:51 Re: 100% Repair Of Laptop & Desktop Motherboard

Hi Sandip,

I got a Sony Vaio PCG-K86P Laptop. Having a weired problem. Not able to see my DVD drive in MyComputer. It disappeared. When I checked in the Device Manager, I can see the drive installed but with an error saying 'driver installed but not able to find the device'. When I tested by using the recovery disk and booting up, it is detected and the recovery process starts with out any problem with disk, but can't see it when I start the system normally. I am using Win XP SP2 which came with my laptop. Can you please suggest me how I can resolve this issue.

Thank you

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