Recent content by greeneminence

Thanks for posting R12 pictures and resistor value! I actually couldn't find any details on this missing part. I will try to solder in 4.7k resistor and come back with the results.

My attempt to fix the power supply was partially successful. I replaced two diodes (B1045, STPR810D) inside the PSU and I'm getting kinda OK readings without a load (10.8V on 12V line, 4.6V on 5V line). When I attach the load (connect the motherboard) all voltages drop significantly (i.e. from...

I also noticed something weird - there's a missing resistor (marked R12) in my PSU. Can someone confirm if this is by design?

Small update - I replaced all caps in the power supply (except the huge one) but it still doesn’t produce correct voltage. Should I replace the voltage regulators?

Thanks for the suggestion. I desoldered all caps in the DC voltage section and here's a complete list of values - maybe someone gonna find it useful: C15 - 330uF / 35V C16 - 82uF / 35V C18 - 2200uF / 10V C19 - 1000uF / 10V C20 - 1000uF / 10V C21 - 82uF / 35V C22 - 82uF / 35V...

I recently bought a Performa 450 which was in very good condition, no visible leakages, blown-up batteries etc. When I power it on, I can only hear a clicking sound from the speaker. Fan is working correctly. I measured output of the PSU and so far it looks like I'm getting wrong voltage on...