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Monitor Built-in Diagnostics. Some monitors support built-in diagnostics. Check the monitors troubleshooting section for detailed instruction. The Dell UZ2x15H monitor uses this. First make sure that the screen is clean and no dust on the surface of the screen. After that unplug the

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Monitor Self-Test operation. Turn off both computer and monitor. Unplug the video cable from the back of the computer also remove all video cables from the back of the computer Next you should turn on the computer. Doing this will cause a floating dialog box to appear on-screen if the monitor cannot sense a video signal and is working correctly. In self-text mode, the power LED remains blue. The selected input will continuously scroll through the screen depending on the input. The dialog box will also appear if the video cable becomes disconnected or damaged. After this off the monitor and reconnect the video cable; then turn on both the computer and monitor.

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Basic verification of power source and connections. Make sure there nothing wrong with the power cord or the wall socket. Verity the intermediary or connecting devices (extension cords, surge suppressors) Swap the power cord/adapter and video input cord

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Stands for "Liquid Crystal Display." LCD is a flat panel display technology commonly used in TVs and computer monitors. LCD has back light that provides light to individual pixels. Each pixel has a red, green, and blue.

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Windows 7 Boot Mode-Legacy Secure Boot- Disabled Windows 8.1 Boot Mode UEFI Secure Boot- Enabled Legacy ROM-Enabled Windows 10 Boot Mode UEFI Secure Boot-off Legacy ROM- Enabled

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If the technician can access BIOS before parts replacement, it is advisable to note down current setting in BIOS on a piece of paper PRIOR to replacement. (Highly Recommended). If the system is not functioning before System Board replacement and the technician cannot access the BIOS and  retrieve the settings from the Original System Board, perform the steps provided in to following pages.

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Removing Memory Modules. If 4 beeps are not by removing the memory modules while turning the system on then the system board is faulty.

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The system board is the main circuit board of your computer and is also known as the main board or logic board. Basically, the motherboard is what makes everything in your computer work together.

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Re-seating the Connection. If the first step doesn't work try resetting the power adapter. First would be unplugging the power cord from the wall outlet and from the system. Let the system for 2 minutes. After that reconnect the adapter to the system and to the wall outlet. It the LED is still not glowing that may mean that the adapter is faulty and further troubleshooting is needed. After that isolate the power adapter issue by removing internal connectors, power connectors. or the cable harness to identify whether any components are causing this issue. Continue this by reconnecting devices one at a time to identify the failed component.

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Verifying Power Source and Power Adapter. Verity the power source with another electrical device. Most power adapter have a simple diagnostic LED(Off,Green, or Blue) for troubleshooting. Green or blue color in the LED indicated adapter is working fine. If the LED is off re-seat the connectors on the power adapter and the system and swap power cord with a working power adapter if possible.

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A power supply is a hardware components that supplies power to an electrical device. It receives power from an electrical outlet and converts the current from AC (alternating current) to DC (direct current).It also regulates the voltage to an adequate amount, which allows the computer to run smoothly without overheating.

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Insufficient Thermal Bonding. If the heat sink is disassembled make sure that all thermal interface material is in place. Make sure that there is thermal grease or a thermal pad between the CPU and the heat sink. Between the heat sink and the graphic processor unit (GPU)- Portables only, ensure colored pads are in place.

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Overheating and Intermittent shut down. Overheating and intermittent may be caused when debris or dust clog the fan exhaust port. This may be caused by the working environment. Blowing air into the clogged parts can be used to clean it. This can be done by either blowing with the mouth or by using compressed canned air. The air needs to have a direct way into the heat sink vents. Use short 2-3 seconds intervals of compressed air as to avoid excessive spooling of the fan.

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Heat is not suitable for computers. Computer are designed with heat dispersion and ventilation so they don't over heat.

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Boot Issues Troubleshooting Steps. First will be to turn on the system and press <F2> key in order to enter the BIOS. Navigate to the hard drive field using the down arrow key. If there is no hard drive detected then shut it down and re-seat the hard drive connector. If there is one detected then restart the system and run ePSA

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Boot Issues-Considerations. Fist step would be to run a hard drive self-test from ePSA. The test is 90% effective and takes less than 7 mins on whatever size hard drive. The text is for ant unnecessary replacement and repeat dispatch.

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The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located.The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast. The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off.

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Multiple Memory Modules. If there is more than 1 module remove all but the memory in the first slot. If there is still an error swap out the other memory module into the same slot. If the error is gone then there was an issue with the first memory module. If the error remains, it's likely an issue with the memory slot in the system board. You should replace a faulty memory module.

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Re-seating Memory Module. Re-seat (take out and put back in) the memory modules (DIMM) and recheck it for a memory error. If there are no errors shown and the system is working the way it should do not replace the memory.

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RAM or ROM. The memory can be short term like RAM or long term like Hard drive.

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Check beep codes. For system-board with and on-board speaker check for beep codes. Remove all of the memory in order to induce an error condition causing a beep code. If the system beeps than there's a likelihood that the processor is performing its basic functions and is not the problem. If there are two processors remove one and if beeps are heard on the one that's still on-board put in the one that was remove and test it.

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Eliminate thermal checks. Make sure that the system is not shutting down due to thermal (heat) issues.
If there is a thermal issue ensure that the fans are operational, the heat sinks are not obstructed, and that the thermal material is in place.

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The processor is the brains of the computer. The job of it is to receive the input and provide the appropriate output.