Sly_Botts wrote on 2022-06-21, 05:00:
Sly_Botts wrote on 2022-06-21, 04:53:
darry wrote on 2022-06-21, 03:44:Do you have a multimeter ? […]
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Do you have a multimeter ?
I would measure the PSU's voltage rails with the PC powered on, but without any valuable ISA or PCI cards plugged in .
What brand/model PSU are you using ? Do you have a spare to test with ?
Do you know what component(s) burned (on the motherboard or elsewhere) ?
I'm 100% sure it was the sound card that did it, as the system ran fine for over a year until I put this card in and then smelled that dreaded burning smell. Which imeediately resulted in the other cards not working right. The PSU is Corsair CX450 and its been fine.
The sound card had been recapped very poorly and I think it caused a short of somekind.
Even if the culprit was that recapped sound card, my concern is that the motherboard may not be the only thing that got damaged. Specifically, testing the PSU to make sure all the voltage rails are still in spec following this incident (which likely triggered OCP on the PSU, which would have initiated the power-off) would not be a bad idea IMHO .
In other words, the PSU may well be perfectly fine, but I would not assume it survived 100% unscathed until at least a summary round of testing its rails. An out of spec PSU can cause weird symptoms and damage components in the long run. How likely that would be following this kind of incident is something I do not know .
Additionally, IMHO, at least one of the faults you described (no audio on one channel when using synth) is seems likly to be due to damage to one the soundcard .
EDIT: Also, I am no expert on this, but my understanding is that, depending on what got shorted to what, potential damage will vary.
For example, shorting a rail to ground, mainly risks damaging/burning the traces/wires that carry power from that rail on the PSU to the short until OCP kicks on the PSU .
However, if the short connects a high voltage rail, like the 12V one, to the 5V one, consequences could be more complex and damage greater as components on the motherboard or its connected peripherals would then be exposed to a higher voltage than what they were designed for.
Somebody with more knowledge and experience will surely confirm or this or correct me if necessary .