OK, so I am trying to salvage my Mum's old PC for which she had bought a new power supply. After that it worked for a long time. After that time, it wouldn't boot (fans would come on very loud, power button LED would come on, disk drives would respond to the eject button etc. but no display, and the HDD LED wasn't flashing (wasn't booting properly).
About a week ago I though I'd try and salvage this poor PC. I tried to turn it on and got the same thing as mentioned above. I messed around trying different RAM configurations (swapping, single stick etc.), reseating the CPU, but to no avail. Until I took off the clip-on/clamp heatsink for the onbaord NVIDIA GeForce 7050 (part of a chipset on my motherboard; nForce 610i). I then turned on the power and attempted to boot, but to no avail.
However, the weird thing is, is that EVERY time I would do this (let the GPU overheat, though not to a dangerous level) and then reattach the heatsink to it again, this would allow me to boot, log in, transfer files, any task.
However, when it does come on and boot, and I am in Windows (windows 7) the whole PC OS/Mouse/Keyboard etc. will freeze occasionally and at pretty arbitrary times, requiring me to hard-reset it (hold the power button until the PC powers off itself).
To summerize my very bad question:
- Is it my graphics card that is failing
- Why would it work when I let it overheat (remove the heatsink and turn it on, though it won't boot during this unless I'd done prior that day for example)
- Can I salvage this PC by purchasing a new dedicated graphics card, or since it is part of the nForce 610i chipset, does that mean that I can't
Thank you for reading my badly put question. I am eager to hear good resposes, especially to the last point