Desktop computer beeps three long beeps , does not come on no display, ram checked it's ok(checked on working PC).Ram cleaned vga card also checked

[Cleopas]

PC beeps 3 long but not coming on and no display, ram checked works on another PC , vga card also checked , it is ok. Fan runs . Please help

[Pyro]

Please list your system specs or model/manufacturer to help people give you support.

If listing specs:
OS
CPU
Motherboard
Power supply
GPU
etc.

Prebuilt:
HP Omen 1280 model #3146ABG406 (Not the serial number)

[Bruce]

when you say your RAM and GPU have been checked and are OK, checked how?
were both installed into a working PC and both worked?

but three beeps are usually graphics and/or memory related, so try only one memory stick at a time, and try running the rig without the GPU if the CPU and mobo support that.

[Bruce]

@Cleopas - any news?

[Bruce]

no activity - closing.