Member Avatar for claire.louise.7587

i have an all in one pc rm infact. it runs windows xp installed google chrome and now computer was crashing and now wont turn on. the screen says no signal input and the tower runs and lights up the keyboard and mouse i recently had to change due to not working works fine now please help

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Original poster described an all‑in‑one that powers but shows no picture. correctly asked what was changed, and ’s suggestion to check POST and cable seating is a good starting point. Below is a short, prioritized troubleshooting sequence—noninvasive checks first, then safe internal steps—so responders can narrow the fault quickly.

Recommended noninvasive checks:

  • Verify the display’s input/source and power indicator.
  • If the unit has an external video port, connect a spare monitor or TV to see if the system outputs video externally.
  • Perform a flashlight/backlight check: with the screen powered on, shine a bright light at close range to look for a faint BIOS/desktop image (indicates backlight/LED driver failure).
  • Remove all USB devices and peripherals, then do a cold boot.
  • Note any POST beeps, HDD/activity LED behavior, or unusual fan patterns; those give diagnostic clues.

If the noninvasive checks point to an internal display issue, safe next steps (only if comfortable and out of warranty):

  • Power down, unplug, and ground yourself before opening. Reseat the panel LVDS/eDP cable and the display power connector on the motherboard.
  • Reseat RAM modules (clean contacts, try one stick in the primary slot). Faulty or poorly seated RAM often prevents POST/video.
  • Reset CMOS by removing the coin cell for ~60 seconds or using the motherboard jumper.
  • Inspect the display power/LED driver board or inverter (older CCFL panels) for obvious damage. If an external monitor works but the built‑in panel does not, the panel or its driver is the likely fault.

Safety and next steps: opening an all‑in‑one can void warranty and risks damage—seek authorized service if unsure. For targeted advice, model number, which part was replaced, whether any POST beeps occur, and the result of an external‑monitor test are the key details.

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Member Avatar for BigPaw

i recently had to change due to not working works fine now please help

I'm sorry for not understanding this sentence. What was changed, and what works fine, please?

Member Avatar for JorgeM

When you power it up, do you see anything on the screen during the power on self test? If not, sorry for the dumb question, but did you make sure the cable was secured both at the video card output as well as the back of the monitor.

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