I would doubt the deflection yoke to be bad.

Use an ESR meter, and check all the caps in the scan and power supply
sections. It is impossible to tell visually if a cap is electrically bad,
unless it had physical damage.

A common cause of a start-up, and shut down, is that there is a fault in the
high voltage regulator, any part of the power supply, or there is a scan
failure due to failed components.

The only way you will be able to fix this monitor is with proper
troubleshooting. This would take a good knowledge of electronics, experience
in monitor servicing, and the proper tools to do the work.

I would suggest you give the monitor out for an estimate. This way, you can
make an intelligent decision to know if it is worth to service, or simply
replace it. Also, when working in TV monitors, there are serious safety
issues to be considered.

--

Jerry G.
======


"yhan" wrote in message
ups.com...
hi there again!

I am repairing an old monitor (I was not able to get the serial). But
its oldy im sure. During power on, i feel a static at the front of the
monitor. An indication of a high voltage but after a few minutes, 4
minutes i think, it suddenly shutdown. So I used my multimeter and
tested the collector of HOT. I measured a voltage but when the monitor
dies up, the voltage also disappears. I changed some bulging
capacitors but still the problem persists.I suspect the deflection
yoke but I have no yoke tester. I heard that running a monitor without
deflection yoke disconnected is not good. I am a little bit lost here
because I havent practiced it for long time now. So can anybody give
me suggestions on how to fix this problem. I know safety precautions
in electronics. I want friendly advise please. Thanks in advance.