I recently upgraded my HP TG01-1020 with a 500W PSU to replace the standard 400W one, hoping to support a better GPU. However, after installing the new PSU, my PC won't turn on. I noticed that the new PSU has an extra 4-pin connector labeled P4 that the original didn't have. I also observed that the new 7-pin connector has more wires than the original, but I didn't think that would affect its compatibility. Since this is my first time swapping a PSU, I'm unsure if I've made a mistake or if the PSU might be faulty, especially since it has a bit of a burnt smell. The original PSU is HP Part # L76557-001 and the new one is model # 500AB-32 A. I've connected everything properly: P1 to P1, P2 to P2, and the 7-pin PWRCMD is plugged in as well. There are some leftover connectors: P4 and a 6+2. I can reinstall the original PSU, and it works fine, so I'm at a loss here.
2 Answers
Have you checked to see if the new PSU is truly compatible with your system? Some HP models have parts that are locked or not easily swappable. Also, that burnt smell is concerning; it might indicate a problem with the new unit. Pictures of how you've hooked everything up could really help troubleshoot this further.
Just to add, if the connectors don't match up exactly, it can definitely cause boot issues. Also, ensure that all your power cables are seated correctly and that no wires are pinched or damaged. It's better safe than sorry, especially with power supplies.
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