I have an older HP pavilion HPE desktop and I purchased an EVGA 700 BR power supply with the plan to upgrade my GPU. The existing 600W power supply doesn’t have 2 8 pin PCIe connectors which I will need for the card I want. However, after replacing JUST the PSU, the fans all turn on and the drives are spinning, but nothing will show up on the monitor. I unplugged everything and plugged it all back into the old PSU to see if the parts still worked and it booted just fine like normal. After switching back to the 700W it will still not bring up even the BIOS. I checked the other cables in the computer to see if anything was loose, but everything seems fine and the fact that it still works with the existing PSU connected makes me think it isn’t a connection issue. I did try switching to the “spare” sata power plugs and the PCIe plugs to see if that helped and it didn’t.
I am currently running windows 7 (but plan on upgrading now that support is gone).
The EVGA power supply is brand new. The existing PSU is an HP DPS-600 A.
I can post other specs if needed. If I need to post the motherboard info, I can’t find it lol. Sorry I’m new to this. It is original to the PC and says Pegatron. The serial info may be on the back, but I haven’t taken it out. It has a 24 pin connection and a 4 pin connection for the CPU.
Any help would be appreciated.
Thanks!