Electronics > Repair

SmallHD DP7-Pro OLED Monitor Failure

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Smoky:
Hey folks, here's another off-the-wall project :scared:

This SmallHD DP7-Pro OLED monitor came amongst a ton of boxes of things from a friend's house-move a few weeks ago.





It's a monitor that mounts to a professional video camera but, as you can see, it included this cool tripod for stationary purposes as well.

Anywhoo, the screen will fade away a few minutes after power-on but, If I wait a few minutes, I'm able to power it back on and the crystal-clear video returns. I used my laptop to feed a signal to the monitor with an HDMI cable. The video quality is as sharp as a laser when it's working.

The monitor is probably over 10 years old since it's described as a "legacy" monitor on SmallHD's website. They sold for over $1500 :o

Is has a fan that runs even after the screen goes dark. Any ideas?

Here's a video I uploaded to Youtube to show you what's happening:



Thanks :-+

Smoky:
I sent an email to SmallHD about this monitor along with a link to the Youtube video. They replied by saying that they no longer support this monitor but suggested that I load an earlier version of the Firmware (V2.0.4). I did but it made no difference.

I powered the monitor up several times but decided to tap the housing when the screen would begin to fade. It made a difference and brought back the video but it would eventually fade to darkness shortly afterwards. The internal fan would continue to run.

If I leave the monitor off for a few minutes and then power it back on, the crystal clear video returns but then it fades to darkness as before.

It seems to me that something is warming up and then eventually losing connection. I don't think it's the HDMI input because the screen would have gone dark instantly.

SmallHD also said that they no longer carry any parts for this monitor. Here's an updated video of me tapping the monitor:

amyk:
Looks like a TAB bonding failure. Since it's intermittent you may be able to apply gentle pressure to keep the connection intact.

Smoky:
Thank you AmyK, I never knew that the connection to the LCD panel was a conductive glue, no solder used for the most part. I watched a few videos as to how the traces are bonded during manufacture. I can also see how easily corrosion can creep into the connection. Since these monitors sit on top of video cameras and used primarily outside, they are made to run much brighter. Which means, they run much hotter.  No wonder why they have internal fans. The video software loaded to these monitors is incredible and, probably, most of the total cost of these things.
 
What I'll do is take this monitor apart and take some hi-res pictures of what I find. Since no visible lines remain after the failures and the video returns crystal clear, maybe it's a "repairable" loose connection? We'll see.

cozza:
Just a query for repairing one of these monitors. There was a screw loose inside it and it appears to have knocked R31 of the display interface board - the resistor was not found after a thorough look inside.

Was hoping OP could measure the value in the unit he was working on.

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