My bios has stopped emitting a beep tone during post but appears to start properly. Also, every once in a while the system starts on it's own. I've read that both of these problems could indicate a faulty power supply. Is there a way to check if the power supply is bad?
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It could also mean that the speaker is faulty or not connected properly.. Are you experiencing any sudden restarts or system hangs or other similar anomalies.?
a faulty PSU would usually make a system shut down, not start up...
my first thought on the lack of a beep would be that the beeper has stopped working. not sure about the start ups though