Bad Mobo or Bad CPU?(No Display)

RudyG87

Commendable
Mar 14, 2016
51
0
1,660
Hey community,
So I'm attempting to repair my sisters HP Pavilion p6631p http://support.hp.com/bg-en/document/c02481324 and I think it may be a bad motherboard. let me tell you the symptoms. When the PC is powered on the led power light on the tower does not turn on. but the fans and the HDD power up. There is no sound from the buzzer speaker and there is no Display. I have tried discrete graphics cards and no display, I checked the ram on a working pc and its ok. I tried to breadboard it with a different PSU and it will not display. The mobo has a green led that lights up, but im not sure what that means. Pretty much I have tested everything I could except for the CPU. I don't have another pc with the same socket that I can test it out on.

Do yall have any advice on testing CPU or do you think its the MOBO?
 
Solution
Unless there have been heat problems from overclocking, bad heat sink contact or other cooling problems, it is very rare for a CPU to fail.
Motherboards are the most common component to fail and you have already ruled out the PSU.
I guess you have to decide if it is worth finding an AM3 motherboard to keep your old CPU and RAM.
Unless there have been heat problems from overclocking, bad heat sink contact or other cooling problems, it is very rare for a CPU to fail.
Motherboards are the most common component to fail and you have already ruled out the PSU.
I guess you have to decide if it is worth finding an AM3 motherboard to keep your old CPU and RAM.
 
Solution


Yep. I found an exact matching mobo around $80 that I can install, and I won't have to reinstall windows or anything and my sisters stuff should be fine. right? or I could find a random am3 board for cheap but, then, won't I need to reinstall Windows. and then won't the windows key not work or should it be fine. The only thing im worried about on going that route is her having to buy a windows OS.
 
A different motherboard will certainly break Windows activation and Windows may need to be reinstalled.
If you have another board of the same model it should be ok.
If Windows does become deactivated and you have Windows 7 / Windows 8, then your free Windows 10 upgrade may still work.