Question about Acer P201WD CRT Monitor
The most probable cause is a break in the cable (red signal line). Try gently wiggling the cable at the computer connector and right at the monitor - these are the usual places for breaks. If this brings the red back into the picture (pun intended), you'll have to find a way to repair or replace the cable.
If you have red or white when the cable is disconnected (check cable warning message) or in the monitor adjustment menus, it is definitely either the cable or the computer video card.
If you can't get red to work at all with the tests in the preceding paragraphs, then it's time to open up the monitor. Check for continuity on the red line (pin 1 on the DB-15 connector to the red shielded wire where the cable terminates inside the monitor). Note: if you are not comfortable working near high voltage or don't know what not to touch, leave this task for an electronic technician. If the cable tests good, then it's time to troubleshoot the red cathode driver circuit on the CRT board, starting with the input signal. You'll probably need an oscilloscope for this job.
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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