[Gllug] Monitor repair

[Chris Bell]

On Mon 05 Aug, Magnus Nilsson wrote:
> 

> I'm guessing it was a spike induced by a thunderstorm. I remember I was
> at work when a storm passed in a few hours. Btw, my PSU also started
> behaving weird after that. I could run the machine for 1-2 hours, but
> then the machine just shut down, just as if you'd pulled the plug.
> I've replaced the PSU with good results, but the monitor is dead. :(
> The thing is that it displays the "no input, please check cables" or
> something like that, so the tube can't be shot, can it?
> 
   I had a 20 inch Microvitec that did a good few years of trouble free
service, then suddenly died. I had the full service manual, and soon found a
blown chip. I purchased the last remaining spare chip from Microvitec, then
discovered that a tiny electrolytic capacitor had gone open circuit, causing
both the old and new chips to fail. I replaced the capacitor and ordered
another 2 replacement chips. They were imported specially for me, and
arrived just over a year later. The monitor worked perfectly for about a
month before a totally unrelated fault blew a hole in the power supply
board. If I had repaired the monitor commercially, it probably would have
been still under repair warranty. I was trained and employed as an
operations and maintenance engineer by the BBC, so have repaired many items
in the past, but many multilayer boards are used now, expensive specialist
surface mount repair equipment is often required, and it is getting almost
impossible to obtain spares.

-- 
Chris Bell


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