[SOLVED] Monitor won’t display ANYTHING

July 31st, 2016

About a week ago my friend gave me his computer to fix it for him. All he brought was the actual CPU so I just unplugged my own power and VGA cords and used them on his CPU on my monitor. Just today he picked up his computer, so today was the first time in a week that I tried hooking my computer back up.
But, when I tried to get it up and running I was unable to get the monitor to display anything. I know the monitor is actually on because the power light comes on the monitor, and I get a message on the monitor that says “monitor going to sleep”. I’ve checked countless times that the my blue VGA cable is hooked securely from the monitor to my PC, but all I get on the monitor is that it’s going to sleep because it’s obviously getting no input signal from the PC… It’s weird though, because if I unplug the VGA cord on one end, a message will pop up on the monitor saying to “Check video cables”. Then, when I plug it back in, the message goes away, but again, after a few seconds, the monitor will go to sleep because of no signal. It seems that the monitor can actually detect when the video cord is plugged to the computer or not, but won’t end up getting an input signal…
I was actually wasn’t home when my friend picked up the computer, maybe he somehow messed up the VGA cable when unplugging it from his computer, but I doubt it… I’ve heard of people getting this issue because of their video card, but I don’t see how this could be the problem, because the last time I reinstalled the graphics card on my computer was about a year ago, and it’s worked fine before this.
Some other info… my friend’s PC was a Compaq and mine is an HP, and I’m positive that they have different video cards. I wonder that if because, his video card is different from mine, and now I’m switching back to mine that that could be the issue… but that doesn’t make sense because his computer worked fine with my cords and monitor.
I guess I can try and obtain a different VGA cord, to see if that’s the issue, and maybe try the monitor and cords on a different computer…
If anyone could help me out that would be great. This is SO incredibly frustrating.

Answer #1
Have you checked to see if there is any bent/broken pins? Does it do the same thing if you hook up a different computer to the monitor?
Answer #2
Does the monitor have a source button? It may be set to HDMI/DVI instead of VGA
Answer #3
About a week ago my friend gave me his computer to fix it for him. All he brought was the actual CPU so I just unplugged my own power and VGA cords and used them on his CPU on my monitor.
By CPU I think you mean the case of the computer.
Remove all memory sticks and reinsert them. Remove CMOS battery and reinsert after 1 minute. If it has a separate video card, remove it and reinsert it. Try the power cables too for the motherboard, especially the 20 or 24 pin one.
Be sure to ground yourself and try not to apply too much force to the motherboard.
Answer #4
Have you checked to see if there is any bent/broken pins? Does it do the same thing if you hook up a different computer to the monitor?
There doesn’t seem to be any broken pins, and I mentioned in my post that I’ll try the monitor on a different computer when I get the chance.
Does the monitor have a source button? It may be set to HDMI/DVI instead of VGA
I don’t think so, none of the buttons on the monitor seem to function without the monitor having an input signal to the PC (btw, the buttons on the monitor are Menu, Auto/Select, Volume up and down, and Power).

Dragon Core wrote: Select all

About a week ago my friend gave me his computer to fix it for him. All he brought was the actual CPU so I just unplugged my own power and VGA cords and used them on his CPU on my monitor. By CPU I think you mean the case of the computer. Remove all memory sticks and reinsert them. Remove CMOS battery and reinsert after 1 minute. If it has a separate video card, remove it and reinsert it. Try the power cables too for the motherboard, especially the 20 or 24 pin one. Be sure to ground yourself and try not to apply too much force to the motherboard.
Yeah that’s what I meant . I have no idea what the CMOS battery is… and the computer does have a separate video card that installed myself about a year ago, if that’s what you mean… Also I don’t know what the 20 and 24 pin cables are that you’re talking about
Answer #5
CMOS battery is a little circular battery, similar to a watch one but larger, found on your motherboard. It’s usually held in by a small flap of metal.
Answer #6
CMOS battery is a little circular battery, similar to a watch one but larger, found on your motherboard. It's usually held in by a small flap of metal.
Okay thanks. I’d rather not have to open up the computer to solve this problem, but if push comes to shove I will…
Answer #7
CMOS battery is a little circular battery, similar to a watch one but larger, found on your motherboard. It's usually held in by a small flap of metal.
Okay thanks. I'd rather not have to open up the computer to solve this problem, but if push comes to shove I will...

To be fair it’s usually in clear view so you’ll only have to take the case off. If you remove it for about 20mins – 1 hour it should clear the CMOS and BIOS settings.
Your best bet is to check everything is in place properly. Check the pins on the back of your graphics card that you’re plugging the monitor into. I had a problem where one of mine came lose and needed to be screwed in otherwise the monitor cable would be slightly out of place.
Answer #8
CMOS battery is a little circular battery, similar to a watch one but larger, found on your motherboard. It's usually held in by a small flap of metal.
Okay thanks. I'd rather not have to open up the computer to solve this problem, but if push comes to shove I will...

To be fair it's usually in clear view so you'll only have to take the case off. If you remove it for about 20mins - 1 hour it should clear the CMOS and BIOS settings.
Your best bet is to check everything is in place properly. Check the pins on the back of your graphics card that you're plugging the monitor into. I had a problem where one of mine came lose and needed to be screwed in otherwise the monitor cable would be slightly out of place.

Cool thanks, I’ll give it a go next chance I can
Answer #9
Oh………bro bro bro. Your Monitor goes out of sync. due to non supportive screen resolution. Try to connect the erlier monitor and set your screen resolution to 800×600 and shut it down. Now connect your own monitor. It will start working…..thats it.
Answer #10
What do you mean brought you his CPU? Doesnt make any sense
to me , It seems your confusing it with something else,Do clarify
about this , And FYI a motherboard cannot post without a CPU (But
i know you got that one confused)
When you power up the PC does it actually turn on? This isn’t clear at all , If it doesn’t then i’d say theres a number of possibilities
A) The PSU on/off switch is set to off (I’m not refering to the RED switch,Don’t fiddle around with it!) B) The PSU is fried , Does the motherboard light turn on? C) The motherboard is fried , You could do the psu hotwiring test in order
to determine if the motherboard or PSU are at fault , You would have to disconnect the main (20/24 pin) connector aswell as the 4pin one,Turn off
the PSU from its switch (Or unplug its cord if it doesnt have one) use a wire
that is stripped on both ends or stretch up a paperclip , Put one end in the green pin
and the other in one of the blacks (I’m refering to the 20/24 pin connector) before powering up the psu from the switch or re-inserting the cord
you must make sure the paperclip doesn’t come in contact with anything else
you might wanna hold it up in the air (But don’t touch the paperclip with your hand)
if the PSU will turn on then its the motherboard thats gone bad , If it wont turn on
then the PSU is faulty But if the PC does turn on and you don’t see anything on screen
then its a different story , You should do the beeping test,A healthy
MB will beep without RAM , So take out the ram modules and see
what happens , Do note however that the case speaker is used for such beeps
and not all computer cases have a speaker,You might wanna check the case>motherboard
connectors and see whats written on em Check if the 20/24 pin connector & 4pin are connected to the motherboard
also if the graphics card have its own power connector/s then check if the
proper cables are hooked to it Now set all this help aside,I don’t get why you even took this upon yourself
considering you’re not a pro , You really shouldn’t deal with PC repairs
if you don’t know your stuff , No offence
@ That’s not it , That scenrio is only possible when the OS is running
here he just doesn’t see anything straight after powering up
Answer #11
What do you mean brought you his CPU? Doesnt make any sense
to me , It seems your confusing it with something else,Do clarify
about this , And FYI a motherboard cannot post without a CPU (But
i know you got that one confused)
When you power up the PC does it actually turn on? This isn't clear at all , If it doesn't then i'd say theres a number of possibilities
A) The PSU on/off switch is set to off (I'm not refering to the RED switch,Don't fiddle around with it!) B) The PSU is fried , Does the motherboard light turn on? C) The motherboard is fried , You could do the psu hotwiring test in order
to determine if the motherboard or PSU are at fault , You would have to disconnect the main (20/24 pin) connector aswell as the 4pin one,Turn off
the PSU from its switch (Or unplug its cord if it doesnt have one) use a wire
that is stripped on both ends or stretch up a paperclip , Put one end in the green pin
and the other in one of the blacks (I'm refering to the 20/24 pin connector) before powering up the psu from the switch or re-inserting the cord
you must make sure the paperclip doesn't come in contact with anything else
you might wanna hold it up in the air (But don't touch the paperclip with your hand)
if the PSU will turn on then its the motherboard thats gone bad , If it wont turn on
then the PSU is faulty But if the PC does turn on and you don't see anything on screen
then its a different story , You should do the beeping test,A healthy
MB will beep without RAM , So take out the ram modules and see
what happens , Do note however that the case speaker is used for such beeps
and not all computer cases have a speaker,You might wanna check the case>motherboard
connectors and see whats written on em Check if the 20/24 pin connector & 4pin are connected to the motherboard
also if the graphics card have its own power connector/s then check if the
proper cables are hooked to it Now set all this help aside,I don't get why you even took this upon yourself
considering you're not a pro , You really shouldn't deal with PC repairs
if you don't know your stuff , No offence
@ That's not it , That scenrio is only possible when the OS is running
here he just doesn't see anything straight after powering up

Well.. thanks for the info. I’m planning on opening the tower tonight and doing everything you guys suggested like making sure graphics card and ram are secure and removing the CMOS.
And, yeah I know I’m most definitely not a pro at this (actually getting into the computer and messing with the physical stuff is NOT my forte), but I do have some experience…
I’ve installed RAM and a video card myself before if that counts…
but anyways, thanks for the advice (from everyone). I plan on trying to fix this soon.
Answer #12
A silly point, but it’s worth asking because many people make the same mistake, but since you have an add-on video card, are you plugging the monitor into that or onto another connector?
Answer #13
THE PROBLEM HAS BEEN FIXED! I’m on my computer using the monitor as we speak.
Thanks to everyone who offered their help (especially Dragon Core and )
I opened the tower up and fiddled around with it for about an hour!
My CMOS battery was completely covered up by my graphics card so I had to take that out, which shouldn’t have been a big deal, but ended up being a major hassle. It was impossible to see that there was a little switch to unlock it to let the graphics card slide out as it was hidden underneath the card itself, so I ended up having to pull so hard that the plastic switch snapped. Then I made sure all the cords and everything inside were secure and they seemed to be, so I’m guessing that taking the CMOS out and putting it back in fixed the problem!
Thanks again to everybody!
Answer #14
THE PROBLEM HAS BEEN FIXED! I'm on my computer using the monitor as we speak.
Thanks to everyone who offered their help (especially Dragon Core and )

Oh great, you have a working computer and might have saved yourself a cupple of bucks. Keep learning about computers, its easy as it looks.