help Getting "No Signal" :-(

[Molferen]

Hello! I have an Acer Predator, about 7/8 years old. Last year when i turned on my computer it started giving me "Red" squares all over my screen/pixelating. I decided that it probably was my GPU's fault, so i removed the GPU and started looking for a new card. It took me a year to find a new one so the pc has just been gathering dust till' now. My dads friend gifted me 2 "new" GPU's Radeon HD 5850 & Ge Force GTX 260 MaxCore 55. They are very old, but i was insured that they still worked perfectly fine. So i put them into my pc and i just have this "No Signal - Entering Sleep Mode" on my monitor now. I have no idea what is wrong with the pc. I have tested 2 different monitor's with 2 different cables (HDMI & DVI). I have even tested it on another Acer Predator machine, that originally was my little brothers, but i still get the exact same result.

And no i cant just go and buy a new PC or parts because im poor as hell..

 

I do not remember the spec's and i cant tell what the specs are from opening up the pc because im a real newbie to this.

But i did take some screenshots so maybe some of you could make out what's inside. PLEASE let me know if you need more info. As is said im really new to this.

The PC is really dusty i know and it's very old.

[SupaKomputa]

wow that dust is soo thick.

 

No signal is when :

A. You pc doesn't turn on completely

B. GPU dead.

 

Since your gpu is working, i say the pc is not working well.

Does it have a beep speaker? Do you hear any sound when booting?

[Molferen]

I do hear a subtle beep when it starts up.