I have a Dell Insprion 1520 laptop here and I just can't get to the bottom of the fault.
It was brought in to me about 1.5 years ago and I purchased a Dell extended warranty for it, Dell replaced the motherboard and then the person never picked it up or paid for the warranty.
Last month I decided to give it to my daughter for school work, so I wiped it, bought new memory and a battery stuck an OS (Win8) on it and she was very happy with it.
Then the day after she flew back to her mum's house it stopped working. she said it would boot up sometimes but not at other times. Then it stopped totally.
She's just popped back for half term. I ran the Dell diagnostics and it said hard drive fault. Bought a new hard drive imaged the OS - same problem.
As it stands I can boot up in the Diagnostics, run tests for hours fine (nff). it heats up, cooling fans kick in no problem.
But if I boot from the hard drive or a Cd (I tried a Kapersky rescue CD that was hanging around) it crashes after 1-2 minutes. when it crashes all noise stops and the hdd activity light goes dead.
What I have tried.
booting on just battery or just charger.
Both sticks of memory in both slots.
Reseating all heatsinks with arctic silver
gently squeezing the internal SATA port in case loose connection.
booting from hdd with no optical drive installed.
booting from a CD in optical drive with no hdd installed.