Standby Problem Solved In LG FLATRON W1642S Computer Monitor
This monitor belonged to the hospital where I work and was brought to me with the complaint that after a power fluctuation in a room due to earth wire leakage, this monitor remained in standby. I opened and cleaned the Monitor thoroughly. The front frame has to be gently peeled off taking care not to rip off the front panel control connected to the mother board.
Then the metal housing has to be tilted gently, after removing the backlight connectors from the sides. The connectors have a press to release lock. The power supply PCB is mounted on the metal case along with the mother board. Let us have a look at the inside.
On inspection of the PSB, I could detect three 680uF/25V caps bulged. I replaced these along with a couple of other electrolytic capacitors. Then did an interconnection of boards keeping it on the rear of the panel, of-course over a nonconducting plastic sheet. Then when I applied the power, the monitor came on.
I fed a few signals and found the monitor to be working perfectly well. So closed the monitor and tested it again for a few hours. Monitor was found working without any problems. Mission accomplished with ease, bringing a satisfaction more to the collection.
This article was prepared for you by Parasuraman Subramanian from India. He is 74 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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Albert van Bemmelen
July 13, 2024 at 2:05 pm
Your excellent instructions about carefully opening the monitor were superclear! Like the mentioned connectors having a press to release lock. And the way the front frame has to be gently peeled off taking care not to rip off the front panel control connected to the mother board.
Last front frame remove warning instruction also often applies to many tv's too.
Parasuraman S
July 13, 2024 at 5:36 pm
Many thanks for your keenly observed expert comments!
Yogesh Panchal
July 13, 2024 at 2:36 pm
Good Job Sir,
What signal inject device is Used for VGA??
Parasuraman S
July 13, 2024 at 5:49 pm
As I have covered its use in my previous monitor repairs, I did not give a picture of it. https://jestineyong.com/power-failed-in-lg-flatron-w1642s-computer-monitor-due-to-burst-capacitors/ - In this article, it is there in the last picture. Just zoom and see. I bought this from Ali Express long back. It is called Micro-VGA Test Generator.
Thanks for your comments!
Yogesh Panchal
July 15, 2024 at 1:55 pm
Ok Thanks!
Parasuraman S
July 16, 2024 at 1:57 pm
You are welcome!
Waleed Rishmawi
July 17, 2024 at 4:28 pm
the joy of replacing capacitors and monitor coming on is joy we will never get tired off. thanks for sharing and have a blessed day
Parasuraman S
July 18, 2024 at 6:24 pm
Many thanks for your loving & joyful comments, dear friend!