Re: pic16f628 HELP!!
Not sure which compiler you are using, but I know the 628 also has an internal osc, and the following may or may not, be relevant:
ER_IO External resistor osc
INTRC_IO Internal RC Osc, no CLKOUT
ER External resistor osc, with CLKOUT
INTRC Internal RC Osc
Also the two previous posters offer some good advice. If your delay is only 500 micro seconds, you probably won't see the flash, and if you are using 3.3u caps, they are way to big. I agree 15-30p as the data sheet says. Why not try running on the internal osc, just to get it working?
Best wishes,
Robert