Re: HansG HH251 - What's this thing?
Replaced the fuse and it comes on, so now I'm back to where I was, at least!
What would make a high pitched tone when it's going bad?
howlerleeches
Member
Last Activity: 07-25-2012, 12:30 AM
Joined: 05-17-2012
Location: Omaha, NE
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Re: HansG HH251 - What's this thing?
The original had a cap with leads on both ends, but I couldn't get those caps to come off. Maybe I can figure something out. I'm going to go by the Radioshack near where I live - they carry a good bit of stuff.
You've been a great help so far. I really appreciate it.Leave a comment:
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Re: HansG HH251 - What's this thing?
I get nothing through the fuse.
Edit: Okay, I got it out and cut the insulation off of it. ET3.15AH250VP is what's printed on it, I believe. Is this easy to find a replacement for?Last edited by howlerleeches; 07-23-2012, 02:13 PM.Leave a comment:
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Re: HansG HH251 - What's this thing?
Maybe it's the fuse on the power board that blew, then. I will check it out. Definitely had the monitor unplugged when testing with the multimeter. I didn't have the power board secured when I was doing a test run with the backlight wires switched, and it moved and shorted against the body as I was turning it off. Just really dumb on my part.Leave a comment:
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Re: HansG HH251 - What's this thing?
The second transformer read the same, but I think I killed the monitor. I wasn't very careful on the last test and shorted it. Not sure what's burnt out now.Leave a comment:
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Re: HansG HH251 - What's this thing?
Do I need to remove it to test it, or can it be done while in the board? I had already pulled the other before starting this thread, thinking I'd be replacing it.
I did put the first transformer back in and swap the wires around, as suggested, and the display stays on! For nearly a half hour, now, anyway. The display is quite dim, though, and the brightness will not adjust.Leave a comment:
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Re: HansG HH251 - What's this thing?
I got no readings on any other combinations. I'm probably not doing this right....Leave a comment:
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Re: HansG HH251 - What's this thing?
I believe you're just seeing a blue marker mark that's on the top of all the caps on this board. As far as I can tell with my limited knowledge and experience, the caps LOOK fine, in that I see none that are obviously bloated.
I'll try my multimeter once I find it.
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Re: HansG HH251 - What's this thing?
I feel I should add that the monitor (backlight - I can see the image if I shine a light through the back of the actual LCD panel) will only turn back on for about 2-3 seconds after it quits the first time. If I let the monitor sit unplugged for a while, it's good for another 10-15 minutes.Leave a comment:
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Re: HansG HH251 - What's this thing?
Sorry for being so short in my first post, but I was in a rush to get it on here before I had to leave for work.
The only thing I've got to take pictures with is my phone, but I've taken a few more. Hopefully they help. Third picture shows the power board with the bad part in the upper left corner. Fourth is the back side, with the inverter transformer removed, and the solder points in the upper right.
Also, there are two lines of numbers printed on the inverter transformer:
784403
61 0912 80 4 H...Leave a comment:
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HansG HH251 - What's this thing?
My monitor will work for about 10 minutes, then flicker and the backlight will go out. Sometimes, this particular component will make a very high pitched buzzing sound. I'm not really familiar with these kinds of things. What is this, exactly? Sorry for the atrocious image quality....
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