I need help seriosly no display

4 Hours Ago

hey people
please bear with me this may take a wile,
ok so i just built a new system i have done this a few times with no problems this may help i have a asus striker 2 fomula mobo it was starting fine then after a few days the clock was not keeping time and i had a cmos error msg at start up on bios screen so i took it upon myself to replace the cmos battery when i put everything back together the computer starts up all fans (cpu,psu,gpu's and case) there are no beeps or clicks but i get no signal to screen absolutly nothing at all.

now i have tried alot of sites and alot of ways to fix and nothing i have tested the ram gpu's and cpu in another computer no problem the mobo is new i tried the jumper and someone even told me to try the clr cmos button on the back alot of people keep telling me to change the bios but i cant change something i cant see

is there anyone out there that can help!
thx in advance
4 answers Last reply
More about seriosly display
  1. Maybe the BIOS is corrupt?
  2. What are the actual parts you have? It might be the power supply. The jumper test just tells you it will start not whether or not it's working correctly. You said you tested the other parts on another computer, can you put yours together and use the other power supply? Normally, the power supply keeps power to the board so it wouldn't need the cmos battery. If you unplug the psu then the cmos battery keeps all the settings for you. Since yours didn't keep settings while you had it plugged in the psu is my guess for the fault.
  3. To clear the CMOS you can take the battery out for 15 minutes you can use a flat screwdriver and gently push on the metal piece on the back that holds it in and it will pop right out.

    Obviously, only do this when the power cord is not between the wall and the PSU.

    While you do that, I suggest you find 1 minute of time in there where you can hold the power button down to make sure all the power is drained out of the computer completely.

    Then you can put the battery back in and see if it comes on.
  4. When you are asking for help, always start off with the system specifications. Then, is it a new build that has never worked or is it a previously working computer that now doesn't? Is it an upgrade that you are having problems with?

    Work systematically through our standard checklist and troubleshooting thread:
    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 no luck, continue.

    If a not new build (a formerly working computer), start here:
    The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.

    I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, but they all use a single short beep for a successful POST.

    Breadboard - that will help isolate any kind of case problem you might have.

    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 (standby power supply): 5 volts always on. The green wire should also have 5 volts on it. It should go to 0 volts when you press the case power button, then back to 5 volts when you release the case power switch. 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.

    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, long single beeps, or series of short beeps indicate a problem with the memory. If you get short beeps verify that the memory is in the appropriate motherboard slots.

    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.
Ask a new question

Read More

Homebuilt Systems