The PSU tester will likely be easiest for most people, since you simply plug in the cables for testing. Standoffs touching the back of your motherboard can cause a short—and a temporarily dead mobo. And if that bit of metal touches the back of the mobo in the right place, it can cause a short—which can lead to the motherboard appearing dead. You can distinguish flash type by leg count. Fix Your Stuff Community Store. Troubleshooting a Computer Motherboard. Edit Options History. Troubleshooting a Computer Motherboard Learn how to troubleshoot some common PC motherboard problems.
Author: Sam Goldheart and 3 other contributors. Configuring CMOS. Updating the BIOS. Add Comment. Please reply on;trevermzbk gmail. The gray wire is really important. 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. 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. If the system beeps: If it looks like the PSU is good, install a memory stick. 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.
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. Best answer selected by josh Techmogamer Reputable. Jan 31, 25 0 4, 0. It may sound very stupid but their is often a red switch in the back of the power supply that you need something like a pen to switch on and off this happend one day i was working on a computer and the power button would not do anything and another time it would post beep either.
Hope this helped. Mar 14, 37 0 18, 4. This exact thing happened to me once. It maintains the system settings even when you turn your PC off. However, this is very simple to fix. Just locate the CMOS battery on your motherboard it is quite hard to miss and replace it with the appropriate coin battery. A Power-On Self-Test POST is the most initial test the motherboard performs to check if all the hardware and sub-components are in order and functioning properly. If an error is detected in any of the critical components like the CPU, RAM, hard disk or even the motherboard itself, the POST screen may display the issue highlighting where the problem lies.
For starters, if your motherboard is performing the POST function and actually displaying it on the screen then there are high chances that the motherboard is working fine. Some motherboards come with status LEDs or beepers that emit various error codes when the system has a problem. Many motherboards come with a built in beep code speaker.
Often times the beep code speaker is found with the PC chassis. If the POST function identifies any issues with the hardware, it will generate a beep sound code. The number of beeps it makes indicates where the trouble lies. So for instance. LED indicators are used on some motherboards to show the status of various components. If your motherboard shows no indication of turning on at all, then the problem could lie with the power supply unit.
If the motherboard does NOT turn on or if it shows no sign of life even after replacing the Power Supply Unit, then that could further indicate the issue lies with the motherboard. Physical damage can be a result of anything from poor handling to accidental electrical surges. And, this can, in worst cases, damage your motherboard.
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