Re: Dell E197FPf no power on and squealing transformer - guidance?
Glad to hear the monitor is fixed. Did you check the voltage at the new U801 output? Also make sure it's not overheating. (maybe another component caused the old U801 death, if everything is alright now it may have died on its own)
Not sure about the transformer noise. I remember a couple ATX PSU with a high frequency noise (near 10kHz probably) caused by bad filter caps on the secondary. Since you already recapped the power supply, this is probably not the issue.
Glad to hear the monitor is fixed. Did you check the voltage at the new U801 output? Also make sure it's not overheating. (maybe another component caused the old U801 death, if everything is alright now it may have died on its own)
Not sure about the transformer noise. I remember a couple ATX PSU with a high frequency noise (near 10kHz probably) caused by bad filter caps on the secondary. Since you already recapped the power supply, this is probably not the issue.
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