Hello,
Problem:
I have a ca. 6 year old TT Toughpower 750W. I run into the problem that my PC is not booting up anymore, so now I do testing to find out whether the problem is with the PSU or the mobo. I have limited resources, although I have a DMM.
The problem seems related to my +5VSB rail and the fact that as soon as the PSU is plugged into the board, nothing works anymore.
When i "paperclick jump" the PSU unplugged, PSU starts up and I can measure all rails fine and the voltages look allright. (It can also power my fans, drives etc. as long as the 20pin ATX is not plugged into the board and the board is paperclip jumpered).
Now...for some primitive "load test" I have a 5V light bulb which lights up on the +5V rail
But when I do this test on the +5VSB (purple wire) of the PSU, the bulb is NOT lighting up and the PSU is not going on either, instead I hear a very faint 50hz (?) ticking inside the PSU.
This also happens when I plug the PSU in the board.
Can I assume that if that primive bulb test works on the normal +5V rail, it should also work on the +5VSB....so this is a strong indication that the PSU is defective? (I just opened the PSU as well but dont see anything odd like bulging caps or similar)
I just need a halfway reliable way to make sure it's really my PSU and not the board.
***
Additional info:
When I plug in the PSU to the board, PS_ON measures 1.83 (which should be more like 0) and +5VSB measures 2.6V - also, the SB_PWR LED on the board is "flickering" (not blinking!) which looks like 50hz flickering to me. And I also hear that faint 50hz "ticking" inside the PSU.
Given my rather amateurish knowledge, my current assumption is that the problem is PSU related, eg. +5VSB breaks in as soon as there is some load? (Still puzzled it displays fine in the DMM if nothing is plugged it to the PSU tho).
Problem:
I have a ca. 6 year old TT Toughpower 750W. I run into the problem that my PC is not booting up anymore, so now I do testing to find out whether the problem is with the PSU or the mobo. I have limited resources, although I have a DMM.
The problem seems related to my +5VSB rail and the fact that as soon as the PSU is plugged into the board, nothing works anymore.
When i "paperclick jump" the PSU unplugged, PSU starts up and I can measure all rails fine and the voltages look allright. (It can also power my fans, drives etc. as long as the 20pin ATX is not plugged into the board and the board is paperclip jumpered).
Now...for some primitive "load test" I have a 5V light bulb which lights up on the +5V rail
But when I do this test on the +5VSB (purple wire) of the PSU, the bulb is NOT lighting up and the PSU is not going on either, instead I hear a very faint 50hz (?) ticking inside the PSU.
This also happens when I plug the PSU in the board.
Can I assume that if that primive bulb test works on the normal +5V rail, it should also work on the +5VSB....so this is a strong indication that the PSU is defective? (I just opened the PSU as well but dont see anything odd like bulging caps or similar)
I just need a halfway reliable way to make sure it's really my PSU and not the board.
***
Additional info:
When I plug in the PSU to the board, PS_ON measures 1.83 (which should be more like 0) and +5VSB measures 2.6V - also, the SB_PWR LED on the board is "flickering" (not blinking!) which looks like 50hz flickering to me. And I also hear that faint 50hz "ticking" inside the PSU.
Given my rather amateurish knowledge, my current assumption is that the problem is PSU related, eg. +5VSB breaks in as soon as there is some load? (Still puzzled it displays fine in the DMM if nothing is plugged it to the PSU tho).
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