| Author |
Message |
santapg
Joined: 24 Dec 2006
Posts: 18
|
 18 Sep 2007 11:40 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
| 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.
|
|
| Back to top |
|
 |
fm_com_28
Joined: 02 Feb 2006
Posts: 153
Helped: 5
Location: Fayoum, Egypt
|
| 18 Sep 2007 12:28 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
| yes. I have an Inpisron 1500 Dell laptop. It has a DVD compo . It can read DVD only but can bot read CDs. what is the problem?
|
|
| Back to top |
|
|
the_risk_master
Joined: 12 Aug 2005
Posts: 671
Helped: 59
Location: UE+MIT, Philippines, (14°N , 120°E )
|
| 18 Sep 2007 13:57 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi,
I have messed with my laptop 5 months ago, I was then experimenting on the parallel port barely with some transistors and suddenly these transistors "feedback" a signal spike to the port and shut off dead my laptop, I was trying to repair it but when I opened it, none of the chips inside is burnt,
btw, my laptop model is Compaq Evo N600C
what chip should I be focusing on, I have also a repair manual of it, but it doesnt help me
I'll be waiting for some response
cheers!
the_risk_master:cry:
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 19 Sep 2007 5:23 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi! FM-COM-28
Atlest can give your name. There is a preset at the bottom of the cd drive lens, rotate it to allign it, but very slowly or allignment of dvd will also get distrub.
Find out the preset. Its under the optical head.
Bye
Added after 3 minutes:
Hi! The Risk Master
Its Sandip Golani. See parallel port is directly connected to LPC. Stands for Low Pin Count IC, its is generally 128 pin ic Quad Pack. But I Doubt that a decoupling cap. has shorted therefore the laptop has konged off.
Check all decoupling cap. there will be 17 in nos. 8 in data line, 4 in control line and 5 in status line.
Bye
Replay what happens.
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 20 Sep 2007 9:41 What happened No More Query |
|
|
|
No More Query today
Sandip Golani
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 24 Sep 2007 8:13 no more query today |
|
|
|
| Hi! what happen no more qurey today
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 25 Sep 2007 8:17 General Preventive Maintenance Of Laptop |
|
|
|
Don't leave your battery unused for long periods of time. Even if you use AC power most of the time, use the battery regularly to keep it in good condition. Switch off your AC adapter when the laptop is not in use. This prevents overcharging.
To extend battery life, you can try decreasing the LCD brightness while using your notebook. You can activate the `Standby' and `Hibernation' power saving modes, too, for better battery life, you can put off the Wi-Fi when not in use.
If you do not use your laptop for extended periods of time-a week or more remove the battery pack from the laptop, but only after discharging it fully.
No eating and drinking near or around your laptop. The least bit of water could short-circuit some sensitive laptop circuits, and render it useless.
You may sometimes be tempted to turn your laptop off by simply holding down the power button until it powers down. Although quick, this method is harmful to the laptop and could cause data loss. A hard reboot should only be used as a last resort. Sometimes this is inevitable, for instance, when Windows hangs. But this should not be a regular practice.
Don't subject your laptop to jerks and shocks. This will help avoid damage to your hard drive. Preferably, power the notebook off before moving it from one place to another.
External peripherals and accessories such as external optical drives, PC cards and USB keyboard lights draw power from the notebook. Disconnect such devices when not in use.
Booting the notebook when it is not connected to a power source draws a lot of power from the battery. Instead of shutting down your laptop in the middle of a meeting, choose the `Suspend' mode if you wish to use it again after just a short interval. This will save battery and help you restart your work faster.
If you have just shut down your laptop, give it 30 seconds before you start it up again. This ensures that the hard drive has spun down, and is not subjected to sudden switching on and off.
Don’t put on the laptop keeping of cloth or bed because generally the air flow is from bottom, regular doing so may reduce the life of laptop circuit.
Don’t press very hard the laptop keyboard because, if damaged can cost very high, therefore while playing game use external keyboard.
Hope u readers will like it
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 26 Sep 2007 9:03 Tips On Purchasing Secondhand Laptop |
|
|
|
| Monday i will be posting tips on purchasing secondhand laptop.
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 27 Sep 2007 9:34 Guide To Purchase Secondhand Laptop |
|
|
|
1. Laptop is used to carry from place to place…so people who travel a lot must think of the weight of the laptop.
2. Every battery has a lifetime. So going for a Laptop with hardly any battery backup is not suggested. Minimum of 45 minutes battery backup is very necessary. So while purchasing the secondhand laptop please keep in mind to check the laptop only on battery for minimum 30 minutes and also keep an eye on battery usage indicator.
3. Carry with yourself an audio, video & Blank CD/DVD so that u can check the audio section and video section of the laptop including the CD/DVD read/write test.
4. Run the scandisk utility available in all versions of windows and check for bad sector in hard disk.
5. Take with yourself any external device like thumb drive to test the USB port.
6. Take with yourself SD memory card to test Card Reader (If the option is available on the laptop)
7. Take any good floppy to test the floppy drive (Any how current Laptops are not coming with Floppy Drive)
8. Take an external headphone and microphone to test the external audio port.
9. Attach the laptop to the external monitor to check the external VGA port is working or not.
10. Open any word file and check all the keys are working or not.
11. Check for battery charging for 5 to 10 minutes and see the battery indicator is showing charging.
12. Press the window and the break keys on the keyboard and see the amount of RAM and CPU details. Further chick the hardware option and then the Device manager to see all driver are installed or not. There should be no Exclamation mark.
13. Slide the LCD screen slowly on the hinges and check any flicker on the display if so there may be a problem on the connector cable driving the LCD circuit of the laptop.
14. Also check the Modem, Bluetooth & Wi-Fi Port if available on your laptop to be purchased (Do only if you know) I will be writing on these subject next.
15. Check the laptop minimum for 45 minutes to see whether laptop hangs or restarts or shutdowns.
16. See the Laptop User manual and Driver CD are there with the Laptop.
17. See that u get a laptop carry case, otherwise u have to purchase one.
18. If all the conditions meets out OK and within your budget just go for it.
19. Happy LAPTOPing.
|
|
| Back to top |
|
|
meetspraveen
Joined: 02 Mar 2007
Posts: 44
Helped: 1
|
| 27 Sep 2007 11:53 hi intel desktop motherboard |
|
|
|
hi sant
I am 845chip set intel orginal motherboard,which is troubling almost a year.i replaced twice with intel,but problem continues..problem is thermal heating?its shutting down automatically after 15-20 min from boot up.give me solution?I am really fed up with this?help me out?
|
|
| Back to top |
|
|
the_risk_master
Joined: 12 Aug 2005
Posts: 671
Helped: 59
Location: UE+MIT, Philippines, (14°N , 120°E )
|
| 27 Sep 2007 14:23 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi Sandip Golani,
Sorry for the long wait, Okay, there's the LPC with decoupling caps, how should I check those? (sorry for my ignorant questions, and please keep this thread alive I need to fix my laptop)
Thanks all, esp. to s. golani
the_risk_master
|
|
| Back to top |
|
|
VSMVDD
Joined: 12 Jun 2005
Posts: 567
Helped: 55
|
| 27 Sep 2007 15:44 some other ideas |
|
|
|
| the_risk_master wrote: |
Hi,
I have messed with my laptop 5 months ago, I was then experimenting on the parallel port barely with some transistors and suddenly these transistors "feedback" a signal spike to the port and shut off dead my laptop, I was trying to repair it but when I opened it, none of the chips inside is burnt,
btw, my laptop model is Compaq Evo N600C
what chip should I be focusing on, I have also a repair manual of it, but it doesnt help me
I'll be waiting for some response
cheers!
the_risk_master:cry: |
i would look closer at the psu section
as your laptop is dead its very likely that a small ceramic fuse has gone
on or around the +5v supply
its even more likely its this if you were drawing the power from the laptops +5vrail for your 'experiment' as all the i/os are double buffered it wont be the main driver i/c or the decoupling caps 'highly unlikely'
most newer laptops use surface mount fuses or they are resistors marked 000
some are small glass looking resistor sized
and have a squiggle of metal in a zigzag
or they can be the only of one or two thru hole type resistors
or can be square long tube made of ceramic and are white
youll find the main ones on the board that connects the battery and not sometimes on the main board
a tip is this
all the chips in a chipset must pass a post test for operation of a boot
the machine beeps and then boots ? do the lights come on any??
or is it dead as dead
if lights come on then its an individual chips supply thats missing
if no lights at all its the main supply rails to the whole main board
if it were a periferal like memory cards
or mpu missing keyboard etc
then the beep sequence will appear
daa da da da forinstance is a memory problem
faulty supply to a chip in the chipset or a fried chip in the set
will not allow even the beeps just lights
| fm_com_28 wrote: |
| yes. I have an Inpisron 1500 Dell laptop. It has a DVD compo . It can read DVD only but can bot read CDs. what is the problem? |
as for the cdrom that wont read cd's except at boot time but will work ok with dvd
when in windows but not cd in windows
i notice you said it will boot a cd disk
therefore its better to look to windows etc as the problem
the drive is NOT bad
and DONT adjust the focus balance pot as mentioned above
or youll kill the drive for good
if your going to at least draw a marker accross it
so as to put it back when you find out its not bad
its just the windows driver windows has decided to use
some internal drives in laptops need there own ide drivers to be able to address the drive properly in all modes
some use special software to make the drive read quietly and this can cause an issue
if you can get a fresh ide 2.5" drive and attach it and install a plain copy of windows xp sp1
im sure then it will work
Added after 3 minutes:
| meetspraveen wrote: |
hi sant
I am 845chip set intel orginal motherboard,which is troubling almost a year.i replaced twice with intel,but problem continues..problem is thermal heating?its shutting down automatically after 15-20 min from boot up.give me solution?I am really fed up with this?help me out? |
the heat pipe on the cpu cooling has a developed a 'fracture'
the pipe carries away heat to the main cooler from the mpu
you could find your battery voltage has climbed
yes climbed
some battery packs get so bad
they output a couple of volts more causing thermal stress
try a new battery and a different psu
if this isnt a laptop as you didnt say then its more likely the mpu is gubbed and has become past its normal spec so replace it esp if
its also in a socket and it is indeed a laptop you have remember you need a mobile type chip
this problems can be caused by another drive or part next to or around the system tempreture detector and not always the main board
see what tempreture it shuts down becouse of is it system or mpu ?? overheat
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 28 Sep 2007 11:05 Hi EDA Fourm Menbers I will Reply Tomorrow |
|
|
|
Hi Members
Sorry For Delay Today Busy I will Replay Tomorrow.
Thanks
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 01 Oct 2007 11:05 No query |
|
|
|
| what happened no query on EDA board
|
|
| Back to top |
|
|
FIXITNOW2003
Joined: 05 Jul 2007
Posts: 17
|
| 01 Oct 2007 13:24 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
have desktop made by polar
when first boot get to the windows logo
and freezes if i press reset next boot from menu (windows failed to load)select normal boot
boots ok works all day
why not boot first time?
have tried new psu new memory new motherboard batery
was windows 98 have upgraded to me
still same
thans vince
|
|
| Back to top |
|
|
Old Nick
Joined: 14 Sep 2007
Posts: 407
Helped: 49
|
| 01 Oct 2007 13:34 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi Sandip,
I'm not sure if you can help or not, but my PC has been playing up for a while now. A few months ago it started overheating (and shutting down), for no discernable reason, the vents were clear the fans were all working, but the case was quite hot. This only lasted for a couple of days, and it seemed to be OK, however it is still running quite hot. And when I first boot my PC, the fan monitor (ASUS probe) tells me that my CPU fan is not spinning (which of course it is), for about a minute, then it seems to be able to sense it's speed and the warning goes away.
Apart from the fan warning and the heat, everything seems to be fine.
The MB is an ASUS a7n8x v2 delux with a Athlon xp2500.
Cheers,
Nick
|
|
| Back to top |
|
|
hanaphie
Joined: 02 Oct 2007
Posts: 1
|
| 06 Oct 2007 6:16 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
i have trouble with my laptop (toshiba tecra8000)
fl inverter with part no UA0392P06 is dead, so my laptop lcd shown dark
(ccfl / neon backlight lamp and fuse is fine)
i try to find schematic / circuit for it (fl inverter) but never come to me.
can you help me with my trouble, please give me schematic for fl inverter or anything about fl inverter ; how it works, basic circuit, etc
thanks before 
|
|
| Back to top |
|
|
Imtiyaz
Joined: 03 Oct 2007
Posts: 4
Helped: 1
|
| 06 Oct 2007 13:07 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi Sandeep,
I have a problem with my Dell Inspiron 8100 laptop. when I slide the LCD
It display some lines or rainbow of colours.I want to know the problem is in
connector cable or TFT
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 08 Oct 2007 11:15 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
| hanaphie wrote: |
i have trouble with my laptop (toshiba tecra8000)
fl inverter with part no UA0392P06 is dead, so my laptop lcd shown dark
(ccfl / neon backlight lamp and fuse is fine)
i try to find schematic / circuit for it (fl inverter) but never come to me.
can you help me with my trouble, please give me schematic for fl inverter or anything about fl inverter ; how it works, basic circuit, etc
thanks before |
Hi Henapaie
It is a basic osc circuit or a simple invertor circuit u can also use any invertor circuit which converts DC 18 volts to AC 150 to 180 volts
Sandip Golani
Added after 3 minutes:
Hi
Your PC Asus motherboard is overheating it is due to over current drawn by may be the CPU or the North Bidge IC, or it can also be CPU core regulator is running under currrent. This needs a complete checkup in CHIP LEVEL. SO if u can proceed tell me i will guide..
Sandip Golani
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 09 Oct 2007 10:01 what happen no more query today |
|
|
|
what happen no more query to day
Sandip Golani
|
|
| Back to top |
|
|
FIXITNOW2003
Joined: 05 Jul 2007
Posts: 17
|
| 10 Oct 2007 14:57 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
any idea on my desktop made by polar
as above ??
|
|
| Back to top |
|
|
master_picengineer
Joined: 03 Sep 2007
Posts: 1051
Helped: 62
|
| 10 Oct 2007 15:34 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hi,
Could you please santapg tell me what to do for my laptop if such situations happen:
1/ I forgot my windows password .
2/ I forgot my bios password.
Thanks in advance.
|
|
| Back to top |
|
|
marwafareed
Joined: 27 Sep 2007
Posts: 2
|
| 24 Oct 2007 7:46 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Hello,
We would like to access the PC motherboard.
We would like to exploit the mother board in controlling certain system, do you have any idea about that, or even how we can access the General purpose input output ports of the used processor.
Thanks
with regards
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 24 Oct 2007 12:51 Hi! Sorry I was out of station on holidays |
|
|
|
Using of computer ports for controlling outer world is fully possible if you visit my web site i conduct a course on pc interfacing ...i can control upto 256 external devices....
Sandip Golani
|
|
| Back to top |
|
|
VSMVDD
Joined: 12 Jun 2005
Posts: 567
Helped: 55
|
| 26 Oct 2007 13:07 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
| FIXITNOW2003 wrote: |
have desktop made by polar
when first boot get to the windows logo
and freezes if i press reset next boot from menu (windows failed to load)select normal boot
boots ok works all day
why not boot first time?
have tried new psu new memory new motherboard batery
was windows 98 have upgraded to me
still same
thans vince |
you need to do a boot block bios flash from a boot disk floppy or cdrom
download the latest bios for your machine and the flash program
make a bootable cdrom from a windows boot cdrom site
example is here
http://www.google.co.uk/search?hl=en&q=bootable+cd&meta=
copy onto it your bios file
disconnect the hard disc & reset the bios
and allow the machine to boot to the bios screen {use del key as it boots}
change the first boot drive to be cdrom {usualy its floppy then cd then hdd anyway}
so the cdrom you made will boot the machine
now when at the cdroms prompt c: {becouse no hdd there it will use c:}
type dir /w/o/p to see the cdrom contence
and type the name of the flash program followed by /?
like
awdflsh /?
this shows the commands you can use
basicaly a bios comes in two halfs an upper program block and lower bootblock
most times a bios is flashed from windows the bootblock DOESNT get flashed
so you end up with the two halfs out of sync
ie older bootblock and newer program block
the bootblock is a lowlevel set of registers used to setup the bridges and devices and perform a post operative tests etc
and MUST also be updated or problems can occur like the one you have
its not always hardware or software and it is most often firmware causes this problem
so you can now enter the example awdflsh C:\bios\firmwarepart.rom /B
the /B is in awards case to enable the bootblock to update
once this is done
now you have the right foundation to find any remaining issues
now reconnect the hdd and adjust the bios again to allow it to boot
just from hdd first and not floppy or other device etc first
now boot the machine to windows and if it now stops try to press esc key
the windows logo will go away and youll maybe see some cause of the problems
these can be in autoexec.bat or config.sys files
remove anything in these files
i see your using windows 98 so you must use a memory manager as win98's own one has a problem with large rams and drive's
so add these lines to config.sys
DEVICE=C:\WINDOWS\EMM386.exe
DEVICE=C:\WINDOWS\HIMEM.SYS
DOS=UMB,HIGH
also try this if you still have no joy
start the computer and press F8 when the bios beeps youll get to a screen of choices
choose to start in dos
now your at the dos prompt type EXIT
and windows will restart
sometimes its the dosprompt .pif file to blame and this will fix it
i personaly would install windows Xp sp2 and be dome with win98
winxp is just as fast if you turn off some features of the o/s
Added after 1 minutes:
| Old Nick wrote: |
Hi Sandip,
I'm not sure if you can help or not, but my PC has been playing up for a while now. A few months ago it started overheating (and shutting down), for no discernable reason, the vents were clear the fans were all working, but the case was quite hot. This only lasted for a couple of days, and it seemed to be OK, however it is still running quite hot. And when I first boot my PC, the fan monitor (ASUS probe) tells me that my CPU fan is not spinning (which of course it is), for about a minute, then it seems to be able to sense it's speed and the warning goes away.
Apart from the fan warning and the heat, everything seems to be fine.
The MB is an ASUS a7n8x v2 delux with a Athlon xp2500.
Cheers,
Nick |
again this is a known issue with asus bios and there probe software
download and install the lastest drivers and windows updates
|
|
| Back to top |
|
|
jeycee00
Joined: 27 Oct 2007
Posts: 1
|
| 27 Oct 2007 17:17 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
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!
|
|
| Back to top |
|
|
palesha
Joined: 16 Apr 2001
Posts: 150
Helped: 5
|
| 01 Nov 2007 4:12 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
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.
|
|
| Back to top |
|
|
prashar
Joined: 15 May 2007
Posts: 11
|
| 02 Nov 2007 19:18 blue screen with P III when XP is used. |
|
|
|
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
|
|
| Back to top |
|
|
mhtplsh
Joined: 21 Feb 2007
Posts: 162
Helped: 3
|
| 04 Nov 2007 10:54 Re: 100% Repair Of Laptop & Desktop Motherboard |
|
|
|
Can't see Sandeep after 24th. Oct.
R U Ok?
|
|
| Back to top |
|
|
santapg
Joined: 24 Dec 2006
Posts: 18
|
| 05 Nov 2007 12:29 Sorry for delay |
|
|
|
It can be computer motherboard problem specially with the powersupply section that is a impure supply sourse.
Sandip Golani
Place your query at info(at)compudrivesystem.com and also aEDAboard because some time i am travelling to some remote place i cannot access sites.
|
|
| Back to top |
|
|
