I'm planning to add an old graphics card to this computer so I needed a better PSU with PCI-E connectors. I installed the Thermaltake Smart 700W and the display doesn't receive a signal. I reconnected the factory HP PSU and the display receives a signal. I tested the new Thermaltake PSU in a different PC and it powered on fine. Tried it again in the HP Envy and still no signal received at the display. How does that make sense? Any solutions?
Thanks. The GPU doesn't support UEFI. I've tried disabling secure boot, but still not able to get it to work. I thought this would be an easy upgrade, but now thinking I'll have to buy a cheap new mobo and GPU.
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