the power source fails to activate in the morning
the power source fails to activate in the morning
I think those components have some issues—they seem to be underpowered or deteriorating. The cap is necessary to enhance performance when you press the power button, as it helps counteract a brief voltage drop caused by current surge. This ensures all parts activate properly. For instance, on my PS3, a weak cap made it difficult to get it running; after two attempts, the red LED would flash but then reset before it started. I recommend waiting about five minutes before pressing the power button and checking if it boots. If it doesn’t, try repeating the process or use a jumper wire to force the PSU to start.
A 20/24 pin ATX plug has a green dot labeled PS_ON# that connects directly to ground, not power. Disconnecting it from ground will stop the unit, as the board relies on this connection for switching. The solid green wire is the only one you’ll see through the wiring. To fix it, use a jumper wire from the top of the plug and connect it to the same green wire. Then ground the jumper wire to a suitable point. This should allow the PSU to power on correctly.
Remember, never let this wire touch any power connections—it could damage both the unit and the PSU. You might test it and discover what’s wrong.
Thank you for clarifying the Cap issue. It seems to be the same situation. Today morning, I powered on the VS450W, turned on the main switch, and pressed the computer button—nothing happened. As you mentioned, I removed all connections from the motherboard and took out the power supply. I shorted pins 4 and 5 (green and black) on the PSU and the fan began to spin, which suggested it was working. Then I reconnected everything to the motherboard, but it still didn’t start. When I connected it back to the motherboard after shorting those pins, it started again. I also checked the power supply’s polarity and earthing to rule out any wiring problems. I plan to conduct further tests tomorrow. Notably, when the GF1 didn’t start, a small PSU tester I purchased on Amazon only lit the +5VSB light while all others stayed off. When I disconnected the power supply from the back and reconnected it after turning it on, it started working. This was noted in the attached file. However, this isn’t a lasting fix.
In fact, I explained it during testing without taking it off the board or case, but that doesn't matter. You captured the main points, and it did reveal a few issues. By the way, I recommend using a ground separate from the PSU or system—like an external one. This would help avoid any problems. The 850W's performance suggests there might be a weak capacitor or a faulty startup relay, though it's hard to say for sure right now. From the 450W tests, I'm also concerned that the 850W issue could impact the board's operation. It’s important to repeat this test with everything connected and ready to power up, so you can see if it actually starts. Keep going, you’ll figure out the next steps through more testing.
Yes and no – Giving power more control might help. But if the cap is fading slowly, it could stop making any difference eventually. Precisely, as long as it functions, time won’t matter. Power supplies can’t tell what time it is. I haven’t heard anyone needing to adjust the clock for a PSU. Probably not.