no display but i can here the processor starting up HP Envy 750-247c

[spend2muchtime]

No signal goes to my monitor when i power on my desktop. The fans turn on, I can hear the cpu starting up then goes idle, my keyboard and mouse light up as well.

• I've tested the monitor and its good - the monitor is good because I connected my laptop to the same monitor using the same cables and the monitor was able to display my laptop.
• I've powered down the machine, pulled the cmos battery out for 5+ minutes, then try powering back on and still does not work
• I've removed the RAM, all SATA devices, and mouse, but still the results are the same.
• I've tried connecting to the GPU and all the integrated HDMI ports on the motherboard.

I originally wanted to remove a HDD and transfer to another computer. 

[spend2muchtime · Accepted solution]

Whoops - I realized I never plugged the psu connection to the motherboard for the CPU. It boots fine now.