RetroBBS - comp.sys.hp48

Damaged LCD

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Subject: Damaged LCD
From: harielsp@gmail.com (Hariel)
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by: Hariel - Sat, 4 Dec 2021 12:21 UTC

Hi everyone, my hp48SX has a dark LCD almost without any contrast. Plus it got a vertical dark ribbon in the middle of a display and (yep more), a dead pixel line in the horizontal.
Do you know where I can find a new display for it ? (or at least a refurbished one in good condition)?

Re: Damaged LCD

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Subject: Re: Damaged LCD
From: opticsmith@mindspring.com (Irl)
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by: Irl - Sat, 4 Dec 2021 15:43 UTC

I wonder whether it's just poor contact between the driver and the display. Poor contrast could be a bad ground contact and missing columns/rows could be poor contacts with the corresponding pads. I don't know whether the display is contacted with some kind of pressure-sensitive pad rather than a soldered connection to the driver, but if that is the case then disassembly and contact cleaning might help. I hope someone who actually knows how it's constructed will chime in here.
On Saturday, December 4, 2021 at 7:21:11 AM UTC-5, hari...@gmail.com wrote:
> Hi everyone, my hp48SX has a dark LCD almost without any contrast. Plus it got a vertical dark ribbon in the middle of a display and (yep more), a dead pixel line in the horizontal.
> Do you know where I can find a new display for it ? (or at least a refurbished one in good condition)?

Marriage is the sole cause of divorce.

devel / comp.sys.hp48 / Damaged LCD

Subject	Author
Damaged LCD	Hariel
Re: Damaged LCD	Irl