Hello. Recently my Pentium II Motherboard Tekram P6F40K-A5 stopped posting. No beep, no video. It happens after i took out processor from the slot for mounting fan. I have applied contact cleaner to slot, change Ram, graphic card, CPU, reprogram the bios, but nothing helps. Power go on, lights are up, but no post. I did some measurements in voltage on three mosfets which are presents on the motherboard and i assume that one of them have insufficient value.
On the attached photo there is:
1. Mosfet number 1 , looks like CPU core voltage. After I insert Klamath CPU it goes 2.8V and 2.0 V with Deschutes CPU , so it looks correct.
2. Mosfet number 2, looks suspicious for me . It is I/O Voltage or something else? Without CPU it has 4,9 V, alter i Insert Klamath it goes down to 4,6V and with Deschutes it has 4,7 V. Doesn't it shoud be stable 5V?
3. Mosfet number 3 , has stable 3,3 V. It goes to PCI. This board has correct implementation with 3.3 V PCI (Chinese Rage XL PCI works fine without mod 😀)

Can someone confirm my thoughts that mosfet number 2 is ging to low with Voltage? Does recaping help in this situation? Caps looks good, those are Sanyo 6.3V 1000uf.

PS. I have ordered post analyzer card 😉