Member Avatar for dhliwayo

my monitor keeps going blank randomly usualy after about 5 or so minutes .
The power is still on but the screen is black.
All i need to do is to switch it off then on again

can someone clever help and let me know what it is or what i need to do

thank
i have a parkard bell by the way

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  • Latest Post Latest Post by nsik

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Symptoms reported by —power LED on but the picture goes black after a few minutes—most often point to an internal power or illumination fault rather than the graphics card. Building on the thread replies from and , here are practical, non-redundant diagnostics, likely causes, and safe next steps that were not covered earlier.

Quick diagnostics you can do without opening the monitor:

  • Press the monitor OSD/Menu button while it is dark. If the menu appears the logic board and video input are alive but the screen illumination (backlight/inverter) is failing.
  • Shine a strong flashlight across the screen with the monitor on. A faint desktop image visible under the light indicates a dead/weak backlight or inverter on LCDs.
  • Note timing and pattern: consistent blanking after warm-up points to thermal/failures in power components (electrolytic capacitors) or inverters.

Likely causes (by panel type):

  • LCD: failed inverter board, aging CCFL lamps or failing electrolytic capacitors on the power/inverter board. See capacitor failures in consumer gear: Capacitor plague and CCFL backlights: Cold-cathode fluorescent lamp.
  • CRT-era sets: intermittent high-voltage circuitry or cracked solder joints; resoldering a socket can help but carries high-voltage risk—exercise extreme caution.

Safety and practical advice:

  • CRTs hold lethal voltages; leave them to a trained repairer. For LCDs, a visual inspection for bulging or leaking capacitors on the power/inverter board is useful, but only if comfortable with electronics. Replacing a handful of bad caps is inexpensive if able to solder; otherwise replacement is often cheaper for older consumer monitors. When seeking repair, document the exact timing and conditions of the failure for the technician.
Member Avatar for mechbas

if you've tried another monitor & have the same prob. then U could have a bad adaptor, if prob. is gone w/a different monitor then the monitor is the prob.(internal damage) there's no cheap way out, (probably a bad yoke or final), take it to a TV shop & get their view. of course, maybe they'll add it to their junk pile which is probably just as well. could also be defective VGA cable.

Member Avatar for nsik

my monitor keeps going blank randomly usualy after about 5 or so minutes .
The power is still on but the screen is black.
All i need to do is to switch it off then on again

can someone clever help and let me know what it is or what i need to do

thank
i have a parkard bell by the way

answer yo you problem... try to resolder the crt socket there must be a loose contact with some solder

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