VOGONS


First post, by exs1s

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Hi Guys,

I wonder if there's an expert on the board for these old LCD screens. I have a problem with a screen for one of my LTE Lite 4/33c. I have checked everything.

Flexcable: Complete continuity. No shorts. No splits. Works fine on my LTE Lite 4/25 model.
Screen: Works perfectly in my LTE Lite 4/25 model.
Inverter Board: Works perfectly in my LTE Lite 4/25 model.
Monior Socket on Main Board: My LTE Lite 4/25 screen/inverter/cable works on the LTE Lite 4/33c.

So I feel like I've changed/tested everything. It's this particular assembly. This is what I'm getting. A wired green colour and only 2/3 of the screen has a picture, the other 1/3 has horizontal white lines.

Keep in mind, this screen works perfectly on my LTE Lite 4/25 model.

So I suppose my question is, how exactly do these screens work? What causes this? And what can I try next?

For reference, the screen in these units is SHARP LQ9D01C.

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file.php?id=57163

Current Models:
LTE Lite 4/25
LTE Lite 4/33
LTE Elite 4/75
Deskpro 386s
Prolinea

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Reply 2 of 4, by exs1s

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Yep. From the moment it's switched on. It's from boot and it does not shimmer or change in any way.

file.php?id=57163

Current Models:
LTE Lite 4/25
LTE Lite 4/33
LTE Elite 4/75
Deskpro 386s
Prolinea

Please also join my Facebook Group

Reply 3 of 4, by Nprod

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It looks like a hotbar flex cable issue, but you mention that the LCD module works fine in a different computer so that rules it out. This means that your problem is on the system board instead. It would require you to find a datasheet uploaded somewhere and probe the TTL signals with an oscilloscope to compare and see where it's falling flat. Not unless there's some obvious broken trace or component on the board...