An LCD monitor was brought to my shop today and the problem was shutting down after few minutes of operation. I hooked it up to my Laptop to see what kind of a shut down it is. Every few minutes, the led started flashing and the computer monitor shut down completely. I was glad to see that kind of shut down because that is usually problem in the power supply.

Upon opening the LCD screen, I started scanning for bad, bulged capacitors. That is usually the case when you have a shut down problem. I could not find any bulged capacitors. I started checking capacitors with the ESR meter and soon enough I found two bad ones in the power supply section. They were 47uf/35 volts.

I replaced them with new ones and fired up the LCD monitors and it worked for more than two hours. I was actually impressed with the quality of the picture on this screen. Although it was unknown brand name but the quality was amazingly shocking. It was kind of old LCD screen and the customer was not expecting this screen to come back to life. He was happy though and rewarded me generously.

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.

2 comments on “Display Shutdown Problem In Umax LCD Monitor

  1. Nicholas Ongondo says:

    thnx a lot.plz I have a problem with my sony 31" lcd it shutdown what could be the problm

  2. WAKHEEL says:

    HELLO SIR. AM WAKEEL FROM NIGERIA . AM BEGINNER OF ELECTRONICS REPAIRER . AM AN ORPHAN SINCE I HAVE NO SPONSORSHIP TO CONTINUE MY EDUCATION , THEN I DECIDE TO LEARN ABOUT ELECTRONICS REPAIR FROM ONE ELECTRONICS REPAIRER CALLED ( GANDY ) AFTER THAT I TRY TO RENT A SHOP . NOW I HAVE START ELECTRONIC JOB AND I NEED YOUR HELPS AND MORE ADVICE FROM PROFESSIONAL REPAIRER LIKE YOU . SO PLZ EDUCATE ME ON HOW TO TEST THE COMPONENTS LIKE IC CAPACITOR RESISTOR TRANSISTOR DIODE NO THE PANEL . THEN PLZ TRAIN ME ON HOW REMOVE THE FLAT IC LIKE SOP IC . FINALY DO HELP ME ON ESR METER AND OSCILLOSCOPE BECAUSE I DON'T FIND THEM IN NIGERIA PLZ CAN YOU BUY THEM AND SEND THEM TO ME I WILL SEND MONEY TO YOU SIR . THANK YOU SIR .

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