I have a Scanport H21 desktop LCD monitor that was having powering on problem. Took 10 minutes of pushing power button to come up then worked fine for hours. Found the 1000uf caps bulging and replaced them(all 6). Worked great for 3 weeks. No Problems. Then last night, turned on, came up as usual, worked fine 5 minutes & screen went black. Can see image with flash light & Windows sign-on logo. Took apart & all caps seem fine. No burn't parts, No bulging caps. What to do next ? I know how to read a meter, But no schematic. Read a suggestion to replace the large 470uf cap. But it's not bulging. Any help Please. Thank You .
Could be back-light or inverter or just a cable connecting them to the screen
You can try a different cable for VGA. Check if the port is lose. The green light is only indicating a proper power supply to the monitor. The display is very much dependent on the VGA cable. If your monitor also has HDMI port, you can try to connect using that cable (provided the display adaptor also has HDMI port). If nothing works for you, take it to a hardware engineer or local repair shop.
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