i recently instald a graphics card... the pc ran well for a 2 or 3 monthss... then when i switched it on, started the UPS and then sitched on the CpU it would not start( pick up Power) .. later on a mechanic came and took out the graphics card and somehow fixed the computer.. he said the card was faulty.. can this be true?
It could also be the PSU is on marginal capacity & taking the graphics card out possibly relieved the load to the PSU. In this case, the graphics card could still be in good working condition. I hope the mechanic did not take the graphics card with him.
As requested by others, more info will help to truly identify the root cause of your problem.