I have a Compaq 8020 18.1" LCD display (guess 4/5 years old) that suddenly shows no picture - was running windows & display blanked for a couple of seconds then came back briefly on before going again - screen is now black as if power is not on, though LEDs & control panel buttons seem to operate as normal.
Flicking around with with on-off control eventually resulted in the COMPAQ splash logo coming up (this happened once & only briefly) before going back to darkness I have taken the back off the unit - it seems to have 4 backlight tube positions, though I can't see any light leaking from the metal panel covering the actual LCD unit (I'm loathe at this point to dismantle any further as I'm not familiar what might spring out into my lap/into the carpet...
Do backlight tubes fail in this manner (ie suddenly) or do they tend to slowly degrade?
As they seemingly have all gone at the same time, would this rather point to the invertor board - do they fail in this way? What about that tantilising flash of the Compaq splash logo?
Thanks for any info