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Windows 7: Monitor doesn't display anyting

02 Feb 2010   #11
neo101

WIN7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by Night Hawk View Post
Another thing besides simply blasting compressed air to clean(which reminds me of someone using a portable air tank used for filling car tires to blast a case out with an 80lb.psi air hose!) is knowing what become the worst dust magnet inside.

Surprizingly the fan blades for case and cpu fans often have to be manually wiped down. Antistatic wipes in plastic containers are generally found at office supply stores that will tend to that. For the PCIe slot there a small thin tube is included with a can of air cleaner you use to clean that out with.
I've been building my own PC's since around 1990!

I use a 'regular' 1/2 inch household (wall/door) painting brush to clean fans/motherboard/ram/chipsets/cards.
Never killed anything yet!

Have you got a loose power connection? Is your power cord pushed tight into power supply/wall socket?

Starting your PC up and it gets hot/then cold causes chip/wire socket creep.
Make sure bios chip is pushed all the way in, go around each socket where wires connect inc main motherboard 20pin, wiggle them and push all the wires in to ensure proper connection!

Power supply could be giving out if you get the weird (non)start up's then fail or a leaking capacitor on your motherboard.
Use magnifying glass to check no capacitors on M/B have burst/are bursting their caps/tops.


My System SpecsSystem Spec
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15 Feb 2010   #12
Rayman

Windows 7
 
 

Thanks all! It hasn't happened again, but I'm going to be spraying air inside the PC to get rid of the dust regardless, and I'll make it routinely.
My System SpecsSystem Spec
15 Feb 2010   #13
Rik55

Windows 7 Home Premium (64-bit) SP1 RTM
 
 

Check the PCI-e cable going into the card. Did the 7900 come with the DELL or did you upgrade. A PSU not supplying enough power will also put the monitor into standby and display a warning on the taskbar. The PSU supplied with Dells with the 7900 is 375W. Seems a bit low, although the min is a 350W for a 7900. If it is the PSU, Dell use BTX non standard PSUs, so you can't just go out and fit a standard one.

I've seen this a few times with older Dells. Monitor goes into standby or Boots keeping the monitor on standby. In my case it was the PSU.
My System SpecsSystem Spec
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15 Feb 2010   #14
computersplus

Windows 7 Ultimate 32 bit
 
 

first thing you should do when buying any OEM machine is take the power supply out and throw it away
My System SpecsSystem Spec
16 Feb 2010   #15
Night Hawk

W7 Ultimate x64/W10 Pro x64 dual boot main build-remote pc W10 Pro x64 Insider Preview/W7 Pro x64
 
 

Quote   Quote: Originally Posted by Rayman View Post
Thanks all! It hasn't happened again, but I'm going to be spraying air inside the PC to get rid of the dust regardless, and I'll make it routinely.
That's good news for you!

Too often people never realize just how fast dust and dirt will be drawn in and accumilate inside any system. The build up can eventually cause problems like this as well as result in warmer temps by trapping heat.

For a card to fail generally depending on the bios you would hear one long and two short audio beeps from the board's own speaker. Lately someone was asking about not seeing anything onscreen and finally mentioned hearing two short beeps. ut oh! The failing card there also pulled down a weak 450w generic supply apparently enough when suddenly nothing worked!

For prebuilds typically the supply is matched for the hardwares like video card the system comes with. If you decide to upgrade hardwares on your own at some point remember the need for a better supply at that time.
My System SpecsSystem Spec
19 Feb 2010   #16
Rayman

Windows 7
 
 

Hey all!
Some quick things:
* I've never replaced anything inside my PC.
* I didn't hear any beeps.

I sprayed out the PC today, and it seemed to be going fine when I plugged it all back in. However, around 10 minutes later the screen went blank...! I opened the PC up, and noticed that some black and white cables weren't plugged into the graphics card, so I plugged it in and then made sure the graphics card was tightly secured. I left the PC for a bit, came back and now it's working...

Any idea what just happened?!
My System SpecsSystem Spec
19 Feb 2010   #17
Night Hawk

W7 Ultimate x64/W10 Pro x64 dual boot main build-remote pc W10 Pro x64 Insider Preview/W7 Pro x64
 
 

If your card requires the additional 12v feed having a large vpu like a high end model that would explain the pulldown where you simply did not have enough power provided by the slot itself. You seemed to have solved the problem which is even better for you now!

The 7900s were a higher end explaining that one. If it continues to work now without further problems you can rule out any hardware faults.
My System SpecsSystem Spec
20 Feb 2010   #18
neo101

WIN7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by Rayman View Post
Hey all!
Some quick things:
* I've never replaced anything inside my PC.
* I didn't hear any beeps.

I sprayed out the PC today, and it seemed to be going fine when I plugged it all back in. However, around 10 minutes later the screen went blank...! I opened the PC up, and noticed that some black and white cables weren't plugged into the graphics card, so I plugged it in and then made sure the graphics card was tightly secured. I left the PC for a bit, came back and now it's working...

Any idea what just happened?!
Loose wire connection = classic for weird start/fail power problem.

Your graphic card connector/wire had worked loose and was dropping out - intermittent/loose electrical connection, causing PC power glitches/failure!

I told you 2 weeks ago to check all your wire connections LOL
My System SpecsSystem Spec
20 Feb 2010   #19
Night Hawk

W7 Ultimate x64/W10 Pro x64 dual boot main build-remote pc W10 Pro x64 Insider Preview/W7 Pro x64
 
 

Apparently when advising a good cleaning a reseat of the card he ended having to check all connections. But at least now things are working as they should. The same goes for other hardwares as well.

When a drive suddenly became a phantom and then started disappearing totally or prompts for formatting appeared the inspection revealed the sata cable was lifted up slightly in the port. The cable apparently was bumped while doing a monthly case cleaning without realizing it until everything was checked.
My System SpecsSystem Spec
03 Jul 2010   #20
Rayman

Windows 7
 
 

Hey folks - me again.

Since my last posting in this thread it has all been fine. However, in the last couple of days it started happening again.

For example, when I was playing Team Fortress 2 the monitor kept dropping in and out, basically making the game unplayable. However, whenever it went off it usually came back a few seconds later.

But just now (like last time) the monitor wont display the PC at all anymore. I've turned all power off, waited and then turned the PC back on, but still nothing. Not hearing any failure beeps.

You guys mentioned overheating - could this be to do with the high summer temperatures throughout the UK at the moment? Is the PC suffering a heat stroke?! :P
My System SpecsSystem Spec
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