Last December we had the television serviced. A high voltage component was replaced that had something to do with the color. This past April the TV would turn off at random intervals. We would have to unplug the set and wait a few minutes then we could turn it on again. After a few weeks of this it would turn off almost as quick as it would turn on. When it turns off the power light will blink. Unplugging does not resolve the problem. Is there an easy fix or should I get a new one?
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Fault with main board. Damaged component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ .
You're either losing high voltage or power supply is not producing the horizontal drive signal, Check for 130v on the collector of the horizontal output transistor, if you're missing your voltage, you have a power supply problem. If voltage is too high you have something open in the power supply such as a low value resistor. If its low, something is shorted in power supply, possibly voltage regulator ic.
It is problem you television High Voltage unite,It may be damage,So you can go to repair it by authorized service center.Some of component or high voltage transformer fuse which make high voltage, there are some power transistor also it damage.
Based on your post/description and assuming that the CRT monitor does not have any failed component(s), it would appear that you have a weak picture tube. If relatively new, claim warranty and have it replaced; if in service for some time, it may require adjustment in the Screen and Focus controls of the FBT; if really old, you may need to boost the color drive transistors B+.
The second and last suggestion above would require that you be familiar and comfortable working with TV/Monitor units, high voltage and working with the unit powered on. If you are not comfortable performing a do-it-yourself, perhaps your best bet would be to seek the services of a qualified professional.
Hope this be of some help/idea. pls post back how things turn up or should you need further information.
Good luck and kind regards.
It sounds like you have High Voltage arc, coming from back of set. Was there ever Horzontal lines in picture when this happen. Or did your picture ever get dark and miss some color? If any of this happen then it could be coming from High Voltage Transformer, and anodes leads coming from trans.I would say clean spark gap anode leads and make sure all are seated properly(tighten). It would help if you could have the back open and notice when the set does this to see if you see sparks and were from. Hope this helps. Remember be carefull around any Voltage.