No video on monitor

Last night my Fiancee and I installed a new cooling system for the desktop. It's a Zalaman CNPS CPU cooler 7000B Cu.

Anywy we took the computer apart, took off the old heatsink and fan, and installed the new cooler, and then put the mmchine back together.

When we had everything hooked in and we boote up, the monitor didn't come on. The monitor is on, it's on standby waiting with te little yllow LED light, and when the machine boots up, it doesn't turn green or come on....

At first we though maybe something wasn't done right. So we checked everything again, made sure the HDs and the other components were all plugged in properly, and tried again.

Same thing, no monitor.

So then we thought maybe the video card whic is only a few months old went, which of course COULD explain the no video thing even though the machine turns on and powers up.

Tried another card, same thing.

I'm seriousy stuck, I hate messing with hardware, and we have checked everything, but the only thing we can think of is maybe the MOBO needs replaced. Anyone have any ideas?

Someone said to re-seat the RAM so I did that. I popped the case back off, Pulle out both RAM sticks, and put them back in, made sure they clicked, and tried again but it still shows a blank screen.

The monitor itself by the way is an Acer AL1916, and when you turn the monitor itself on, it shows the acer logo, which is odd to me, I dont have any monitors that ever showed a logo by itself, but it does none the less.

Does it beep at all?
Did you use a anti-static wrist strap?
You can also try reseating other things like your cpu.
You can try "benching" the MB by taking it out of the case and only connecting the cpu,vid,mem, and psu. If it still does not post you can use components from other systems.

Howdy..

take out the new parts that you just put in and put the original stuff back in and see if that solves the prob.

i'm thinkin that the psu don't have enough power to power everything plus the new fan etc.

cheers
acidtone..:)

From the sound of the MB was damaged. If the box is still booting up and just doesn't have vid, you could try a PCI video card, if you can get your hands on one. If that works then you know it has something to do with your AGP Slot.
Good luck

Did you remove the floppy flatcable? If you connect this one back the wrong way around (pin 1 on the wrong side). Does the floppy drive led burn constantly? If it's connected the wrong way around you get this same behaviour.

My money is on bad memory, at least this exact same thing has happened to me in the past and replacement of the memory resolved it. Not to say there couldn't be a multitude of other things to cause it.

I highly doubt its the memory. I've been working at a computer repair store since I was 15 and I have never seen a computer with those symptoms only have bad memory. I think it is either MBD or PSU or CPU.

Then apparently you haven't seen enough

bad memory is going to throw beep codes.

Unplug everything...hardrives etc

Just boot with keyboard, mouse video

That should narrow it down..........

You should at least get into the Bios...if not its board or memory damage

Then add hardware piece by piece

Power could be the issue as stated previously


MLF

You didn't remove that little sticker that says

"unauthorized tampering may lead to serious death or injury'

did you? I vote that the power supply can't handle the new
equipment. Uninstall and test...
:cool:

Well,

1. Are you getting any beeps from the BIOS?
2. Have you tried a different video cable?

The logo is not that unusual. Most screens will produce some sort of display if they are not getting a signal.

That is a very heavy cooling combination. It is quite easy to damage the motherboard when installing them. Particularly after the MoBo has been used for a while............they get brittle.

I don't think that it is a power supply issue. Compatible CPU fans don't use that much different in my experience.

Bad memory won't throw beep codes all the time, unfortunately.

Bad memory will cause some of the most voodoo symptoms you'll ever deal with in comp repair. I'm not talking about dead memory, I'm talking about failing memory...

Troubleshoot by sticking the monitor on another system, and keep swapping parts around between boxes until you find the culprit.

Hope you have extra stuff!

The interesting bit would be if there are any beeps at all or just one.

One would suggest that it has booted properly whilst none would suggest that it has not.

Check that the voltage on the back of the PC hasn't been switched... I was in a competition in high school, and the only symptom was that the monitor wouldn't come on... I checked everything, video card, ram, monitor cable, you name it... time ran out... the guy overseeing that station flipped that switch, and presto... it started working again... not sure if this is your problem, but double check... I think it should be set to 115 in the US...

The voltage selection switch is (by design) not something you can change by accident.

This is the cooler:

http://www.mvktech.net/content/view/934/39/1/2/

It weighs 755gr which is around 27 ounces!

Intel socket 478 and AMD 754, 939 and 940 have a recommended maximum of 450gr. For other sockets it is 300gr.

Even carelessly moving a machine with a cooling unit like that in it can screw it.

:eek:

Thank you Slot you are correct. Opus learn some manners. I do know what I am talking about.

Just wanted to say thanks to everyone, I found a solution that's got the machine working again :)

I took the advice that was simple first and tried taking the MOBO out and we couldn't get the cable to each so we tried re-seating the board and then slowly adding all the components back in one at a time.

It worked the first time we booted up so then we re-added the NIC and soundcard and so on and the machine is back to normal AND the internal temp has gone down almost 10 degrees with the new cooling system.

So thanks everyone for the help and the ideas it's much appreciated, and me knowing almost nothing about hardware except that it's easy to break I don't like messing with it but thanks again, as you all helped get it going again :)

Anyway, I'm starting to ramble, exhaustion heh. Went to the Nekromantix show last night and I'm bruised up and sore form the mosh pit :)