Re: HannsG 281 Monitor doesn't display video
Hello again!
It's been quite a while since i last added to the post. Finally had time recently to pull everything out again and tried re-seating all of the cables. But to no avail.
Very strange. Nothing appears to be seated poorly. I plugged all the ribbon cables in and checked the behavior. it's the same as the original post.
At this point, I think I'll have to punt and get a replacement (with an extended warranty).
Thanks for the assistance in helping me debug what I could!
...
dsallard
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Last Activity: 02-20-2012, 06:18 AM
Joined: 12-10-2011
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Re: HannsG 281 Monitor doesn't display video
Thanks tom66. I'm not sure which one is the LVDS cable, but I'll inspect and press them all!
I'll post an update when I can set up my temporary workspace again.
DavidLeave a comment:
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Re: HannsG 281 Monitor doesn't display video
Thanks, PlainBill.
I take it the 'no signal' you refer to is not an absence of a video source to the monitor itself, correct?
During my mid-assembly testing when I first noticed something was 'different', I didn't have any video source connected, but the monitor DID display a box stating there was no input.
So, something is interrupting any video output that would normally go to the LCD panel.
Can you remind me again, which one is the 'signal board'?
Thanks!
Davi...Leave a comment:
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Re: HannsG 281 Monitor DOES display video!! :-) For a few minutes... :-(
Hello again!
So I decided to punt (for now) and went to reassemble the monitor and store it through the holidays.
Just to be safe I checked the behavior in the middle of re-assembly to be sure I didn't make things worse and to my surprise, the HDMI input was working!
I continued to reassemble and check that things were working. All was good through the completed assembly, and after transport and connection to my PC.
I logged into the computer, logged...Leave a comment:
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Re: HannsG 281 Monitor doesn't display video
Hi PlainBill,
I tried with a known good RGB source and got the same behavior as I did previously.
I also checked the voltage regulators again with the black lead of the DMM on the mounting screw of the power supply board. I get (roughly) 5v, 3.3v, 0v on U7 and 3.3v, 1.8v, and 0v on U8.
Since I had already taken most things apart, I also flipped the power supply board and didn't see anything out of the ordinary there. I didn't take the heat sinks off, but what I could see underneath looked pretty...Leave a comment:
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Re: New Members - please post your introductions here
New to the forum, but glad I found it. I'm a EE/CompE by training and an Applications Engineer for the past 20+. So, naturally, everyone expects me to be able to repair my own electronics (even me). But it's not as easy as everyone (even me) thougt and I'm glad for the folks who have ventured well ahead of me and I can ask advice from!Leave a comment:
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Re: HannsG 281 Monitor doesn't display video
Thanks, PlainBill.
Looking at the photo, I put the black lead on the large pad on the bottom of U7 and U8 respectively. I then measured the voltage on the left, middle, and right hand pads on the top of U7 and U8.
I thought the middle pad on the top is the same as the large pad underneath, so I expected there to be 0 volt difference. Is that correct? Or should I have used a different location to get 'ground' (and I would get a difference of roughly 5v and 3.5v between the left and right most pins of U7 and...Leave a comment:
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Re: HannsG 281 Monitor doesn't display video
Good morning!
With a fresh pair of eyes, I reconnected the cables (except speakers), including the case switch.
Two corrections on behavior:
When I apply power to the Monitor (turn on power strip or plug in power cable):
The Power LED is OFF
1) When I press the POWER button,
a) the power LED goes to BLUE
b) the screen is black
c) after about 7 seconds, the screen lights RED briefly (less than a second, I can see the back lights come on)
d) the screen goes...Last edited by dsallard; 12-20-2011, 06:45 AM.Leave a comment:
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Re: HannsG 281 Monitor doesn't display video
Removed this correction content after I edited the post above... Haven't learned how to delete this (now redundant) post.Last edited by dsallard; 12-19-2011, 10:17 PM.Leave a comment:
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Re: HannsG 281 Monitor doesn't display video
@Jetadm123 I'll try to probe the pins and send the results. Just curious of how many of the connectors need to be connected to get the results. I had to disconnect that board to get to the 'business' side of it. Hopefully I can get to the pins with the cables connected.
The top button on the case was the 'Menu' button, as I recall.
@PlainBill: I did try using the two inputs available on the monitor (HDMI and RGB).
However, I recently discovered I may not have had good RGB input. The replacement...Last edited by dsallard; 12-19-2011, 10:15 PM.Leave a comment:
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HannsG 281 Monitor doesn't display video
Hello,
I have a HannsG 28" monitor that worked great until my kids told me that it stopped working.
I checked it out and find that it powers on, and the screen lights red for a few seconds, but goes to sleep mode.
If I press the top button on the side of the monitor, I will see RED, GREEN, and BLUE screens each for about a second then it goes back to sleep. I can repeat this by pressing the top button on the side.
I don't see any intro screen (I actually can't remember if it showed any type of 'HannsG' logo on startup when it was...
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