- You Will Be Stunned Of What’s Found Inside The TV (No Power Fault)
- Shorted SMD Transistor In LED TV
- Never Saw TV LED Lights Like These
- Simple Way To Repair Color Problem In LED TV
- A LED TV Repair Attempt With A Disappointing Result
- How To Repair No Power Symptom In LED TV
- Dead LED TV restored back to life. Model: Fuji Japan
- 50″ LED TV Display Problem Repaired
- LED TV That I’m Not Able To Repair
- Shorted LED Lights In An LED TV Repaired. Model LG
Power IC and Zener Diode Shorted in DVD Player Repaired
The complaint of this LG DVD receiver and player with model HT355SD was no power. No power symptom can be caused by many factors such as open main fuse, bad on/off switch, bad power components, shorted mainboard and etc.
I had to open up the casing (see the photo below) in order to see if there is any components in the power section that had burnt and etc. The main fuse was good and no burnt components.
What I saw was ants nest surrounding the legs of the power IC and power FET. The circuit track of the power IC was corroded and this could be the problem of no power symptom. See the three photos below:
As usual, just before I replace the components I will check the surrounding components and I found a zener diode shorted. If you would like to learn how to check components like a professional you can get Jestine’s Ebook on testing components. This ebook is a must for all beginners.
The shorted zener diode
Next I cleaned the board fully and bought the new components-one zener diode and power ICE3BR4765C and fixed into the board and power On.
The power came back and worked beautifully. It was an easy job and the parts also not expensive.
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments. If you have electronic repair articles to share with us, please contact us HERE.
P.S- If you enjoyed reading this, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!
Note: You may check out his previous repair article in the below link: