Samsung 940NW LCD Monitor Repaired
The SAMSUNG TFT-LCD Monitor Model 940NW of this story belongs to my 6 years old son.
The complaint was impossible to watch a steady video-out, because it was blinking all the time.
It’s the time to dismantle the device, and I’m honor of being the first person in opening this Monitor.
Till here all the plastic covers were taken out carefully and please do not use hard force otherwise you will damage the plastic clips. Now it’s time to check on the electronic circuits.
Once the metallic covers are out the PCBs can be separated (only two PCBs).
In this PCB (SMPS) there were three bulged e-caps (820µF/25 x 2 and 470µF/25) and many cold solder joints.
The three bulged e-caps were substituted for three similar in good conditions, the rest of the e-caps were checked with the Blue ESR Meter and all of them were ok. All the cold solder joints were fixed with fresh tin. But I decided to clean the golden contacts of the LCD Display with a Pen Eraser.
When everything was concluded the Monitor was armed again and look at the result.
Now my child is very happy and smiling a lot because his Monitor is working fine now.
This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.
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Note: You can check out his previous repair article below: