Hanns-G HG281D 28" TFT - Multiple Problems

[budm]

Re: Hanns-G HG281D 28" TFT - Multiple Problems

It looks OK from the pictures. The MB is more than 10 layers board, so it will be a little easier for the main board of the monitor which may be 4 layers at most. Using extra flux also a big helps.

[gordesky1]

Re: Hanns-G HG281D 28" TFT - Multiple Problems

Have great news!!!.

Monitor works like brand new now! Was much easier than on the computer board, Every problem is now fixed the interference lines and the white dots, And also the monitor brightness controls, Now i can finally turn the brightness down now lol

At first i thought it was something else causing that problem like the button board. But nope was those 2 caps that budm said!

Thank you very much for the help budm!!! If it wasn't for you i wouldn't even know if the caps was even bad or those 2 was the problem ones lol


I posted some pics and of my soldering, Not the best but i don't think its bad well i hope not lol.

[budm]

Re: Hanns-G HG281D 28" TFT - Multiple Problems

Great and thanks for the follow-up.

[jd101506]

Re: Hanns-G HG281D 28" TFT - Multiple Problems

Hey all, new to the forums and it seems like we have some pretty great knowledgeable users. I have a HG281D Rev 2 (MFG date: 2009) that I've replaced the caps on.

Prior to the replacement the monitor would turn on briefly and then I'd lose picture. It would stay "on" but there was no picture. After waiting for roughly 25 minutes with it on, the picture would return. I was able to play games, surf the web, and use as normal. Wanting this to be permanent... I replaced the PSU caps with the kit from LCDAlternatives. This didn't fix the issue. So I went ahead (Being stubborn) and replaced the caps on the logic board. The monitor came on! It works great now aside from one glaring issue... It is stuck at minimum brightness.

The monitor will come on, and it allows me to adjust brightness but nothing actually happens. Very odd. I know the backlight works as it comes on 100% for 1/4 second before going dim. I can adjust the contrast, picture hue, and everything else BUT backlight. Is there a specific cap that controls this? The backlight was working prior to replacing the caps on the logic board.

Any pointers would be awesome. Thanks all!

[jd101506]

Re: Hanns-G HG281D 28" TFT - Multiple Problems

I should also note: I can "adjust" the backlight via the menu. As in, the brightness bar itself will go up and down at command but it doesn't affect the backlight itself.

I can post pictures if need be, but I haven't touched any of the backlight stuff itself. I've also left the monitor on for 20-30 minutes with no change.

[stevekasian]

Hi, all. It's been over a decade or so since I posted here. In that time, I'm sure certain folks have passed away or otherwise disappeared.
I remember this being a business, where the person running the board did repair work for hire, whilst helping DIYers at the same time.
Is there still a patriarch here who would be willing to replace my caps for hire if I send my board in?

I acquired another Hanns-G HG281D which eventually fell victim to some bad cap issues. I would love to replace the caps myself, but I've since developed Parkinsons tremors, and can no longer do board work as a result.

Thanks!