It's been 2 years since I've repaired this Samsung P277HD TV with a bad inverter transformer. I use this TV as a computer monitor. It is now exhibiting a problem with the brightness control. I would set the display to "text" or "internet" which is a dimmer setting than "entertain". About a half hour later, the screen would go max brightness back to "entertain" mode. I've even manually set the brightness to 40 or so and 20 to 30 minutes later it's back to 100. I think the power supply chopper circuit is failing.

What do you think? Has anyone...

Re: Samsung P2770HD problem found, but....

Just received the new transformer today and it's soldered back into the power supply board. The TV is working again. Since this was my Mom's old TV, I went and checked the backlight, contrast, and brightness settings to see and they were all maxed out. No wonder the old transformer overheated. All the settings are backed off now. Hopefully this set sill last a few more years.

Re: Samsung p2770hd problems



Just posted this: [url]https://www.badcaps.net/forum/showthread.php?p=801471#post801471[/url]

Hope it helps you.Re: Samsung p2770hd problems<br /> ... it helps you.Re: Samsung p2770hd problems



Just posted this: [url]https://www.badcaps.net/forum/showthread.php?p=801471#post801471[/url]

Hope it helps you....

I've been reading all that I could about the Samsung P2770HD on this forum. It has the issue where the channel info or picture would show momentarily then goes to black after powering on. I've checked the caps visually and with an ECR meter and they're fine. The diodes measured fine. Voltages from the power supply to the main board were in spec. I then checked the continuity on the transformer, 1.3k ohm on one secondary but the other is open. After removing it from the board, I can see that the open side is scorched. Third photo will show some scorching. Fourth photo will show the 3rd winding...

Re: New Members - please post your introductions here

Hello,

I was looking for a potential fixer-upper in the classified, a Sharp 46" with sound but no picture. As I searched for a cause, I came across this website. This website is a great resource. I'm a middle-aged married mechanical engineer, RC aeromodeler, Arduino neophyte, who is ready to rescue another TV from going to the dump.

Thanks,
Whirligig