My CPU was heating up to around 65 deg C and last time this had happened (about a year ago), I got thermal paste put between the CPU and heat sink and this managed to get it down to about 45 - 50 degrees.

This time, I got some thermal paste and put it myself. However, my PC is not showing the POST display and not starting up.

This is what happens

• LEDs light up
• HDDs spin
• Mouse is getting power
• All fans including the processor fan starts
• No display on monitor
• No diagnostic beep sounds (no sounds at all)

What I have tried

• Removing everything including RAM, HDD, PCI cards, AGP card
• Boot up machine

No changes from first state.

What steps can I take to figure out where the problem lies?

Note (might be important) When I removed the heat sink, the processor came out with it (it was stuck to it inspite of the processor latch on) Had to pry it separate with a screw-driver.

Configuration

• Pentium 4, 2.8 Ghz with HT (very old, I know)
• Original Intel Mobo with onboard sound and graphics (GB series)
• 2x512 Mb DDR-RAM
• 2 SATA disks (320 Gigs / 250 gigs)
• DVD Writer
• Creative Sound Card
• Network card

Any help would be appreciated.

Thanks!