Question No display signal from PC ?

[SummerSausage52]

I have a Lenovo H50-55 PC. It's a full-size tower. I got it second hand, cleaned it, and applied new thermal paste to it. It turned on fine, but that was 4 or 5 months ago. I am now having trouble with getting video output signal from it. I've tried the integrated HDMI and VGA as well as using HDMI on a graphics card (the fan spins when the PC is turned on). The monitor always recognizes that it is connected to another device, but it doesn't see any signal. I've tried 3 different monitors.

 

[helpstar]

replace the cmos battery

which graphics card and cpu is inside?

 

[SummerSausage52]

replace the cmos battery

which graphics card and cpu is inside?

Just take it out and put it back? Or completely replace it?

The graphics card is a GeForce GT 1030 and the CPU is an AMD A10-7800 3.5GHz.

 

[helpstar]

completely replace it

 

[SummerSausage52]

completely replace it

I ordered some replacements, but I won't be able to put a new one in until tomorrow. Is there anything else I can do before then?

 

[helpstar]

you can power off from the wall and clear the cmos by jumper or remove the battery and insert it after a minute. then power on again with monitor in the gpu and on. Be sure the monitor is set to hdmi

 

[SummerSausage52]

you can power off from the wall and clear the cmos by jumper or remove the battery and insert it after a minute. then power on again with monitor in the gpu and on. Be sure the monitor is set to hdmi

I tried it by removing the battery for 1 minute and then reinserting it. No luck unfortunately.