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How do you set the proper resolution? Instruction booklet says nothing about how to set it up.

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Short summary tied to the posts by , and :

Most flat-panel monitors of this era are fixed‑native‑resolution devices. The monitor OSD (the little on‑screen menu) controls brightness, contrast and basic scaling, but the actual output resolution is set in the operating system / graphics driver. If the OS will not offer the correct mode, update the video card driver and let Windows (or the graphics control panel) detect the monitor so the native modes appear.

Quick, practical steps for the resolution question:

  • In Windows XP/2000: Right‑click Desktop -> Properties -> Settings -> choose the recommended/native resolution. Use Advanced -> Monitor to set refresh rate if needed.
  • If only low modes appear, install the correct GPU driver and, if available, the monitor INF so Windows can read EDID.
  • If custom modes are needed, use the GPU vendor control panel (NVIDIA/ATI/Intel) rather than the monitor OSD.

Troubleshooting for the power/LED problem described (green -> yellow, shuts off after a few minutes):

  • Test with a different known‑good PC and a different VGA cable to rule out sync/cable/GPU issues.
  • With the screen black, shine a flashlight at an angle: a faint image visible = backlight/inverter problem; no visible image = likely power supply or logic board fault.
  • Let it cool and run again; if it lasts longer when cool, suspect a thermal fault.
  • Visually inspect (only if experienced) for bulging/leaking electrolytic capacitors on the power/inverter boards. Do not open the case unless comfortable working around high voltages.
  • Because the LED color codes vary by model, consult a service manual or qualified technician before assuming a particular meaning.

Given the age of a used Rad‑5c, weigh repair cost (inverter, caps, labor) against replacement.

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Member Avatar for caperjack

It says here that it has on screen digital control. when you install did you load drivers .

Member Avatar for dolsentdc

I just picked up a used one it stays on for 3 to 5 min and then the screen goes black the green power light turns yellow. If I hit the power buttun it goes back on but then goes off again after 3 to 5 min. Do you know what the yellow light means?

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