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Re: that was nice
I do not think it would cost much. As initially posted, defective components could be a cap, resistor or a diode pair (at most 5USD). It is my opinion that none of the more expensive components could be defective, otherwise the unit would not operate completely.
The only possible expensive component would be the yoke. But then again if it is determined to be defective, you might be better off not repairing. It is challenging to remove because of many other components before it; it is often glued to the glass tube, and the other components that has to be removed to gain access to the yoke are very very difficult to align when assembled back.
Incidentally, the opposing diode pair is often found on top of the yoke assembly.
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Placing a strong light behind the panel will show if the lighting tubes are not working. You should see some dark display if the tubes are not working but everything else is working. Cost to replace is over the cost to buy new.
From the description you give, this sounds like a failure in the circuit board, normally the capacitors go and the thing refuses to power up, however, the fact it defaulted to a low resolution indicates that the actual board is in some way failing, possibly a damaged circuit, or component.
I would think it could be repaired and it may be a simple job for someone who can identify the failing component, however, I think that the cost of getting it repaired would outweigh the cost of replacement
That happen when the display detects a failure and goes off, likely a short circuit. It is a monitor issue. Looks like you are one of hundreds unfortunates clients that got a broken inverter driver. Here are instructions how to fix it:
hi..i think you have a problem the CPU/Computer that's whystays on screen for so long.1st step check the IDE cable connection form the mother board to Hard Drive and 2nd check the memory or check all hardware`s.Good Luck and Have a nice day
We have about 20 of these at work. Four of them went dark, to varying degrees, in the two years they were covered by warrantee, and were sent back to the factory for repairs. Since then, eleven more have gone dark. I finally got around to looking at them a few days ago. I have repaired five so far, and in every case it has been the same cause. The capacitors on the inverter board are burning out. There are two 470uF, two 1500uF and a 1000uF that are not holding up. Costs about 4 bucks for replacement parts at digikey; qtys and Part numbers are: 2 PN #493-1561-ND 1 PN #565-1664-ND 2 PN #P13124-ND It takes about an hour, and minimal skill with a soldering iron to fix.
Of course I'd go for broke, I'm a tech. Anything and everything could be repaired, there is just a "but" always somewhere.
If you are to consider the repair cost if you would avail the service of a tech, purchase of parts (if readily available), downtime, then economics and logic would dictate purchase of a new one;
If you are basing on a DIYers challenge, then it would be repair as long as possible. I used to have a Hitachi 21 inch that I have to increase the heater voltage so as to compensate for out of focus problem. I only stopped using it when the wife cleaned the yellow casing (used to be white) and spilled cleaning fluid inside.