CTX VL400 Monitor, dead after lightning

[Bart Bervoets]

I got this one in and i´m a bit puzzled.
The owner told me the monitor died last night in a
thunderstorm.
Yet, when i turn on, i hear a high pitched whine, led is
on.
I checked the usual parts in the primary power supply,
and found nothing, all voltage regulators, diodes... seem
to be fine.
I would not expect a secundary failure from lightning,
or...?
The guy´s pc was hit as well, but the damage there was
the harddisk, not the power supply.
Weird.
Any suggestions what this could be?

Bart Bervoets

 

[Mr TUBEAMPS]

check the EHT transistor, see if its shorted
if so replace it, and before you do, check the
voltage at its collecter pin it should be 100-130 volts.
if not your power supply is sus.
only check the voltage with the transistor out.
you can also connect a light globe 240volt at 100 watt
to the collector pin and ground to test power supply
it will only be half brite or so.

john

"Bart Bervoets" <nekobe@online.be> wrote in message
newsKmdnSYSvvxIGvPdRVn-sw@is.co.za...

I got this one in and i´m a bit puzzled.
The owner told me the monitor died last night in a
thunderstorm.
Yet, when i turn on, i hear a high pitched whine, led is
on.
I checked the usual parts in the primary power supply,
and found nothing, all voltage regulators, diodes... seem
to be fine.
I would not expect a secundary failure from lightning,
or...?
The guy´s pc was hit as well, but the damage there was
the harddisk, not the power supply.
Weird.
Any suggestions what this could be?

Bart Bervoets