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NO DISPLAY: Please help

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Anonymous
a b V Motherboard
November 27, 2010 7:06:17 PM

Hello, I am having a problem with my first build.

I currently have this system build:

- Antec 300
- i5 760
- Asus P7P55D-E LX
- OCZ Gold DDR3 1333mhz
- OCZ StealthXStream 500W
- Cooler Master Hyper 212 Plus
- Samsung F3 HD103SJ 1TB
- Samsung S223L 22x DVD+/-RW
- Radeon HD 5670 1GB (no power needed)

I put the system together today, with no problems. I fired it up and the screen was fine - booting up into the BIOS.

BTW - the 5670 has DVI, HDMI and Display Port; I was using HDMI connected to my TV, as I do not have a DVI monitor yet.

Once the system was working, I then went into the BIOS and changed the boot order so that the HDD was first (and the removable drive that was #1 was moved down).

I then changed the fan around on cooler master hyper 212 plus - having to remove and refit the graphics card.
After I then went to boot up and found that I could not get any display; however I knew that it had worked before.

I then looked up online about clearing the BIOS/CMOS, I took changed the jumpers so that the BIOS would reset - having no effect upon my display. I then tried the other method: taking out the CMOS battery for a few minutes. This did not work either.

I also took out the graphics card and replaced it, but I still have the same problem.

Would the boot order that I changed in the BIOS effect the graphics on screen?

Please note: I do not have integrated graphics; only a graphics card (5670)

What other possibilities might be causing the problem? - I know that my system works, but something has changed since I turned the fan around, took out the graphics card and changed the boot order.

Many thanks,

Jamie

More about : display

a b V Motherboard
November 27, 2010 8:59:21 PM

The video card is seated properly? Remove the HDMI cable and put it back. Did you remove the HSF when you fiddled with the fan? If the CPU is not seated well it won't go. Remove the HS again, remove the paste, put some new one and try again.
a c 156 V Motherboard
November 27, 2010 9:59:45 PM

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 beeps 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. You do have a case speaker installed, right? If not, you really, really need one. If your case or motherboard didn't come with a system speaker, you can buy one here:
http://www.cwc-group.com/casp.html

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.

Motherboard LED's mean very little. When on, all they are telling you is that the computer os plugged into a live power socket and the PSU is switched.

Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps:
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...

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.

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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