Reply 20 of 32, by AppleSauce
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TheMobRules wrote on 2022-08-23, 15:42:The PSU is ATX right? First thing I would check is if you have 5V on the standby line (purple wire usually) when you flip the switch. If there's no voltage at that point then probably there's a short somewhere and the PSU is in protection mode, in some cases you can also hear a high pitch sound and/or the fan tries to spin up for a second.
Carefully go over each joint you soldered, also checking the capacitor orientation, post pictures if you're not sure. Also look for solder blobs that may have spilled over parts of the PCB.
Regarding your earlier question about the big caps, it's strange, I never had issues soldering these at around 350C or even with a crappy 40W iron. Besides, it's a single sided PCB, I don't think it would sink a lot of heat compared to a motherboard for example. Maybe your iron was oxidized or not making proper contact with the pads/legs?
Yeah its an ATX psu , a dell NPS250KB.
The room I'm working in is in the back of my house and there's no heating there and its pre cold like under 10 degrees Celsius , maybe that's why the iron is having trouble?
Here's a picture of the back in case anything stands out.