Problem with Dell Vostro 400 strange power switch issue
Problem with Dell Vostro 400 strange power switch issue
I own an old Dell Vostro 400 minitower that handles various non-essential tasks (Windows 10 functions, though it runs slowly). The front power switch has stopped working recently. A repair shop tried replacing it with an external switch but couldn’t find a suitable replacement, so they installed a long-wiring solution inside the case. Now, when I activate this external switch, nothing happens. The only fix is unplugging the back power cord and reconnecting it. After doing that, the external switch functions properly, allowing me to turn on the computer. Any suggestions?
I noticed it 'stopped working' recently. It seems the replacement switch might have failed too. This could be confirmed using a voltmeter or ohmmeter when the switch is turned on.
One switch is one issue, but two leads make me wonder if connecting the power pins directly on the motherboard would yield the same outcome as what you're currently experiencing. I'd consider unplugging the 24-pin main harness from the power supply and then reconnecting it to see if the pins can be reshaped or if oxidation affects the connection. If bypassing the power switch and reattaching the harness doesn't help, I'd question the condition of the power supply.