Question about Compaq V700 17" CRT Monitor

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No display there is a problem in the horizontal section of my monitor.the horizontal deflection transistor(c5552) was faulty, I replace it with a transistor of 15 ampere,1700 volt.When I tern on the circuit in a series board with 100 watt bulb a sparke on a point of kit and series bulb start blinking fastly, and after 3 seconds the bulb stops blinking and the kit returns back to its previous condition(the previous condition was of monitor was that when I turns on monitor it consume power and dont gives display and a contious sound of tik tik outs from kit) After that I check the replaced transistor, that transistor was ok.It means there is some other component is now become faulty.Note that I operate the monitor kit without connecting the picture tube after replacing the transistor. please help me. thanking you in anticipation.

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Test all HV mylar capacitor around the horizontal circuits.. usually .22 1600volts with color orange or blue..replace caps that value has changed..

Posted on Mar 09, 2009

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Posted on Jan 02, 2017

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ok
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Hi,

Appreciate the "Ask Me".

I am assuming that you have more than just familiarity with electronic components and circuitry, the use of a DVM and a soldering iron. Further, that you have access to a service manual.

Width problem is basically insufficient horizontal deflection, then analysis would have to be in the horizontal section. Areas to initially focus on:
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  2. 110 V peak to peak at collector of Q403, if yes check Q 402 & 404 as well as T401;
  3. other components that affect the horizontal size are:
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  • Q 405, 406, 407 & 408;
  • D409
  • L401
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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