My cousin came to my shop this morning and brought me a CRT TV set. There was no sign of a working TV, not even a stand by LED. My cousin manages a Hotel in the city of Bethlehem and he has over 100 rooms that has the same kind of TV set. This morning, he said that he had problems with electricity and some of the TV sets in the room just stopped working.

When I opened this TV set, there was no sign of smoke. The fuse was not even blown. I had to blow the dust with a dust blower so I can see the component on the board. I started checking voltages reaching the main capacitor, there was no reading on the main capacitor indicating a problem in the primary power supply.

I used a magnifying lens and a bright light so I can see any kind of burn or blown parts. I saw just one disk capacitor (681 2kv). It was not blown, but I could see cracks on the side of it. There were two of them in parallel. The other disk capacitor was not blown. I think this was caused by a high voltage reaching the primary power supply and these capacitors protected the TV from this high power.

I replaced this blown part and I was about to turn the TV on but I did not. I wanted to make sure that there were no more blown or shorted parts in the set. I attached a light bulb on the fuse holders and turned the TV on. The light was bright then it went dim assuring me that all is well and it is ok to turn the TV on. I put the fuse back on and turned the TV on and it worked nicely. I checked all the voltages in the power supply and all were within specifications.

As always, I tested the TV set for two hours to make sure all is well. My cousin was happy to see his TV comes to life. He will bring me more of these TV sets to repair in my shop. I am just hoping that these TV sets will have the same fault as this one that I just repaired.

About

10 years of practical electronics. owner and operator. I service the Bethlehem area in Palestine. I repair Xbox 360 and all play stations and modify their power supplies. also repair lcd and Plasma tv sets, and lcd computer monitors. I have a degree from Bob Jones University in general business and one year degree in Industrial electronics. a intensive course in Media. I also work as a camera and audio man as a free lancer. Also great experience in video editing and installing surround systems for home and movie theaters.

One comment on “No Power In GVstar CRT TV- Model H-2136A

  1. Azmat Hussain says:

    I am Azmat Hussain from Pakistan. I have just completed my Basic electronic course and electronic repairing is my hobby. In these days I am learning CRT TV repairing. I have read your stories about how you repair electronic appliances specially CRT TV and have learnt so many new things and waiting more for stories from you.
    And today i want your help in repairing TV with the Tuning problem.
    Dear, yesterday I have a received a TV set from my friend for repairing. The problem is that TV is not tuning any channel. I think there is a problem with tuner and first of all resold all the joint of its tuner thinking that probably there might be some dry joints. But after soldering all the joints still TV was unable to tune any channel I decided to replace its tuner and but even after replacing tuner problem is not resolved. TV is not tuning any channel. I have also checked the supply volts to tuner which are 5 volt. The TV is using Chinese made TV KIT. I also want to inform you that the original Model number of Tuner was LONGSIGN CWC-1053-V and I replace it with LONGSIGN DWE-8053-V. Please help to find out what is the actual problem with the TV. I will be really thankful to you.

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