Boots Up... After 10 Tries!

From alltatuath in the PC Support Forum:

Hi there, I have a Pentium 4, 3ghz,  windows XP service pack 3, - recently it has been overheating so have cleaned fan and a friend who knows a bit about computers put a coolant on the CPU - this appears to have worked but for some reason when i boot up it can take up to 10 times to get in using safe mode then doing system restore to a date i know it was working.

Have done a RAM memory diagnostic test and it came back with no errors.

It works fine till i switch off - then when i try to switch on next day it boots up - sometimes to post and safe mode option but then it switches itself off - no input data comes up on screen like when you first turn the monitor on and its not booted up yet.

Could the monitor be the problem - the screen sometimes goes a bit jelly like - at the moment i am on it and works fine - can anyone help?

Look forward to hearing from someone.

Any ideas? Head over to alltatuath's post in the forums and help out!