Question about Gateway GT5438 PC Desktop
For a desktop, first try the monitor on another computer, preferably with a different video cable. If it doesn't show a picture; the fault is probably at the monitor. Also try a different monitor on the Gateway.
If these two tests show that the monitor is bad, replace it to use your computer for now. (If it is under warranty, consider warranty repair. Otherwise we can try to diagnose the problem. (Common problems for an LCD monitor are the power supply, the backlight, the backlight inverter or the main board itself. The inverter is the easiest part to replace and can be tested with an oscilliscope or a multi-meter that can measure several thousand Hz.)
If you get a picture, try the monitor on the first computer with the second video cable to rule out a bad cable.
If there is still no picture, the next step is to determine if the computer has a video card installed or if you are using the on-board video. Many computers have both so try plugging the monitor into the other ports if there are any. (The on-board video is disabled when you have a video card in place. When reconnecting the cables, it can be easy to plug into the wrong spot.) Check if the monitor is working.
Replace the video card with one appropriate for your computer (you will need the specs for your computer's PSU (original specs - 300W) and card slot (PCIe x16)). You need a card that doesn't require more power than the power supply can put out. (Remember the CPU and other components need power too. Card specs will include the recommended minimum power supply needed to run the card.)
If you can, get a card that matches the existing video card. This will avoid a major problem. You need to uninstall the current video card drivers to put in a new one. You can try booting into Safe Mode by pressing F8 as you power up the computer. (This can take several tries to catch the point where the computer looks for the keystroke. You only have a few seconds.)
If you have been using the on-board graphics, get a video card. You will need to press a key (F1 or F2 for most Gateways) to enter the BIOS then disable the on-board graphics when you install the new card.
I hope this helps.
Posted on Mar 31, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
Maybe your memory is bad or the memory slot is bad.
Remove the Power Cord, Open the Case and remove one of the
memory chips. Set the chip aside then try rebooting the computer.
If it boots, then you know the memory chip you set aside is bad so mark an x on
it with an ink pen. If it fails to boot then move the chip to the next
memory slot and try rebooting. If it fails take the chip out and set it
aside, then put the other chip in and try booting it in both slots. If it
boots, just to verify that the chip set aside is bad, mark an x on it and put
it into the open memory chip slot and try booting.
Diagnostic Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4"on the front or back panel. The lights can be off or green. When the computer starts normally, the patterns or codes on the lights change as the boot process completes. When the computer starts normally, the patterns or codes on the lights change as the boot process completes. If the POST portion of system boot completes successfully, all four lights display solid green. If the computer malfunctions during the POST process, the pattern displayed on the LEDs may help identify where in the process the computer halted.
NOTE: The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can appear either vertical or horizontal.
The computer is in a normal "off" condition, or a possible pre-BIOS failure has occurred.
The diagnostic lights are not lit after the computer successfully boots to the operating system.
Plug the computer into a working electrical outlet and press the power button.
A possible BIOS failure has occurred; the computer is in the recovery mode.
Run the BIOS Recovery utility, wait for recovery completion, and then restart the computer.
A possible processor failure has occurred.
Reinstall the processor and restart the computer.
Memory modules are detected, but a memory failure has occurred.
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