Member Avatar for groove04

problem I do not have any video from the pc everything internally seems to be running fine i.e. powers on and off but I am staring at a black screen. Any help would be appreciated.

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Brief expert summary referencing the thread: shows the system runs but the built‑in display stays black, and correctly pointed to the link between the two halves. That combination most often means the fault lives in the monitor/power-distribution side (connector, distribution/inverter board, LVDS ribbon, or the LCD/backlight) rather than the main system board. The following steps focus on safe, practical isolation and low-cost fixes.

Quick, non-invasive checks and measurements

  • Power and indicators: with the unit assembled and powered, note any LEDs on the monitor/power board. If the AIO shows system activity but the monitor LEDs are off, suspect the monitor power feed or distribution board.
  • Visual inspection: unplug, open the monitor section and inspect the small distribution/inverter board and the mating plug for bent pins, corrosion, scorch marks or bulging electrolytic capacitors. Photograph the board and connector for parts lookup.
  • Clean & reseat: clean the plug and mating header with electronic contact cleaner and firmly reseat. Mechanical wear/oxidation on that plug is common.
  • Measure DC rails: with the AIO powered and careful (use a multimeter), check for the low-voltage DC rails on the cable that feeds the monitor (commonly +5V and/or +12V on many AIOs). If those rails are missing the problem is the power/distribution board or its connector.
  • Signal vs backlight: if power rails are present but screen stays black, the LVDS/video feed or the backlight driver may be bad. Gently flexing the flat cable while powered can reveal an intermittent cable break near the hinge.

Repair vs replace, and safety notes

  • Broken solder joints at the board-to-plug are common; reflowing those joints often restores service. If not comfortable soldering or probing live rails, take it to a shop. CCFL inverters produce high voltage—do not probe inverter outputs.
  • Search by part number printed on the inverter/distribution board or on the connector harness for replacement parts or donor units. Often the cheapest option is a used monitor section or a whole replacement AIO.

Those steps isolate the monitor-end failure and help decide whether a simple connector/board swap or a full replacement is the most cost-effective fix.

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Member Avatar for BuggZ

Does the computer have an external VGA connector? If it does, try to connect an external monitor to see if the system is really completing POST. Also see if you can see a very dim display by looking at the LCD from an angle after the computer boots. If you can see a dim display the backlight for the LCD is bad. If that is the case the LCD amy have to be replaced.

Member Avatar for groove04

i took the monitor off and found the mmonitor connection. when i used another monitor it worked. i also switched the connection with the suspected bad monitor and got a picture, but when i put the monitor and computor back together i got no picture again. it still come on but not the monitor. unfortunatelly it is a combo computer with the power supply built into the monitor section with a plug in type distribution board that plugs in when both parts are connected.

Member Avatar for BuggZ

Could be a bad cable or a bad solder connection where the video connector attaches to the mainboard. The main question is will the repair cost (parts and labor) exceed the value of the computer?

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