I have some trouble trying to POST a old Intel 486 DX motherboard. If i power up the board , the CPU becomes hot quickly and it doesn't make any beep noise, but only background noise (even without RAM sticks installed).

There is one problem though : the i486 DX-33 (MHz) CPU is missing 5 pins

Here are some pictures of the motherboard and the CPU :

UPDATE: I was able to resolder the 5 missing pins and make a good electric contact (the black stuff around the pins is not electric conductive ! )

As far as i have seen, the motherboard seems perfectly fine (no missing components except the turbo LED resistor).The crystal is a 66.666 MHz one. Unfortunately, i do not have a spare 486 CPU to test.Still, even with the repaired pins, the motherboard and the CPU have the same symptoms.

The question is: Which one is "dead": the CPU or the motherboard ?