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New Build . No video Display.

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December 22, 2010 12:31:48 PM

Motherboard: ASUS P7P55D-E Pro LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel
Video Card: Nivida Geforce 9800 GT
Power Supply: Thermaltake TR2 600W
RAM: 1 Stick of PNY 2GB DD-10666, 1333MHz

Everything is plugged in right. Power supply is working. Ram works. Video card works. Everything on the Motherboard is working. Fans, lights and whatnot.

I don't know. any help?

More about : build video display

a b Ĉ ASUS
a b U Graphics card
a c 435 V Motherboard
December 22, 2010 12:46:21 PM

Reseat the ram, 9800gt, and both power supply connections to the board (24 and 4 pin leads). Make sure the backplate is square and no leftover material is touching any of your connections to the ports. Then pop out the board battery for a few seconds and reinstall. The last time this happened to me the video connection to the board from the monitor wasn't seated properly.
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a b Ĉ ASUS
a b V Motherboard
December 22, 2010 12:48:49 PM

Your motherboard has diagnostic leds on it. If you can peep through the case cover ( if it is perforated ) on to the motherboard, you can see which diagnostic led is on red. If you can't, then open the case cover and restart your computer. Now you can see which led is on red.

Anyway, you say video card works. Then it should be your monitor or monitor connections.
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a b Ĉ ASUS
a b U Graphics card
a c 156 V Motherboard
December 22, 2010 1:15:03 PM

If you hav eno display, how do you know that everything is working?

Work through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

If not, continue.

I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.

Make sure you plug the CPU power cable in. The system will not boot without it.

I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.

You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps:
Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.

At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.

This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.

If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card.

Silence or long single beeps indicate a problem with the memory.

Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.

Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.
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