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Re: Trouble with laptop display

Message-ID <68783165@news.ausics.net> (permalink)
From not@telling.you.invalid (Computer Nerd Kev)
Subject Re: Trouble with laptop display
Newsgroups comp.os.linux.misc, alt.os.linux, alt.comp.os.windows-10
References <7tfkklx99v.ln2@Telcontar.valinor> <1g2p8dv6u6h04.dlg@v.nguard.lh> <gc8lklxffk.ln2@Telcontar.valinor> <1058tit$koge$2@dont-email.me>
Date 2025-07-17 09:10 +1000
Organization Ausics - https://newsgroups.ausics.net

Cross-posted to 3 groups.

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In comp.os.linux.misc J. P. Gilliver <G6JPG@255soft.uk> wrote:
> On 2025/7/16 19:41:52, Carlos E.R. wrote:
>> On 2025-07-16 18:52, VanguardLH wrote:
>>> Take a flashlight, and shine it at the display at an angle.  Can you see
>>> what would have been displayed if the backlamps came on?
>> 
>> I can easily try that. [...]  You are absolutely right, I can see the 
>> Compaq logo as it tries to boot.
>> 
>> So, unless it is a faulty cable, it is garbage time.
> 
> Certainly worth a try. Would be a pity to junk it just because something 
> has come loose. The fact that you said it had given problems in the past 
> that were curable by closing and opening it definitely _suggests_ either 
> the connector, or the hinge switch, may be loose - though the inverter 
> could indeed be flaky. But have a look first!

Actually there's no inverter, the service manual* states that it's
an "LED Display Assembly" and no separate backlight board is
listed. So an LED backlight. It could still be an issue with the
power supply for the LEDs, but potentially an issue on the
motherboard, not easily fixed by replacing a separate board. Or
a faulty wire/connector is still possible, though replacing modern
connectors for FFC cables is extremely difficult compared to eg. a
failed through-hole inverter capacitor, so I'd be most worried
about that really. I recently stuffed up one of my successful
repairs when I broke one of those unfathomably fine-pitched
connectors while reassembling the device afterwards. Extremely
frustrating! Oh for 1980s tech and its 0.1" spaced pin headers...

* https://h10032.www1.hp.com/ctg/Manual/c01740724.pdf (pg. 26)

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Thread

Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-16 13:44 +0200
  Re: Trouble with laptop display Marco Moock <mm@dorfdsl.de> - 2025-07-16 14:00 +0200
    Re: Trouble with laptop display Java Jive <java@evij.com.invalid> - 2025-07-16 13:22 +0100
    Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-16 20:43 +0200
      Re: Trouble with laptop display Marco Moock <mm@dorfdsl.de> - 2025-07-17 08:06 +0200
        Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-17 12:16 +0200
  Re: Trouble with laptop display Arkadiusz 'Black Fox' Artyszuk <blackfox_pl@protonmail.com> - 2025-07-16 14:20 +0200
  Re: Trouble with laptop display Robert Heller <heller@deepsoft.com> - 2025-07-16 12:39 +0000
  Re: Trouble with laptop display Herbert Kleebauer <klee@unibwm.de> - 2025-07-16 14:43 +0200
  Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-16 10:29 -0400
    Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-16 20:42 +0200
  Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-16 16:49 +0100
  Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-16 11:52 -0500
    Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-16 20:41 +0200
      Re: Trouble with laptop display Java Jive <java@evij.com.invalid> - 2025-07-16 21:11 +0100
        Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-16 17:21 -0400
      Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-16 20:12 +0100
        Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-16 17:15 -0400
        Re: Trouble with laptop display not@telling.you.invalid (Computer Nerd Kev) - 2025-07-17 09:10 +1000
      Re: Trouble with laptop display Jack <Jack@invalid.invalid> - 2025-07-16 19:09 +0000
        Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-16 22:30 +0200
          Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-16 16:58 -0700
            Re: Trouble with laptop display Robert Heller <heller@deepsoft.com> - 2025-07-17 01:58 +0000
              Re: Trouble with laptop display Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-17 03:29 +0000
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-17 12:21 +0200
      Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-16 18:12 -0500
      Re: Trouble with laptop display Paul in Houston TX <Paul@Houston.Texas> - 2025-07-16 20:42 -0500
      Re: Trouble with laptop display "J.O. Aho" <user@example.net> - 2025-07-17 08:34 +0200
      Re: Trouble with laptop display c186282 <c186282@nnada.net> - 2025-07-17 03:37 -0400
        Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-17 10:16 +0100
          Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-17 13:00 +0200
            Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-17 13:50 +0100
              Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-17 17:04 +0100
                Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-17 13:11 -0500
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-17 20:25 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-17 19:58 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 08:51 +0200
                Re: Trouble with laptop display Simon <SimonJ@eu.invalid> - 2025-07-18 06:04 +0000
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 11:12 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 12:48 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 13:31 +0100
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-17 19:57 +0100
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-17 19:50 +0100
            Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-17 13:04 -0500
              Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-17 20:29 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-17 19:56 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 09:01 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 11:14 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 12:26 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 13:29 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 21:18 +0200
                Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-17 16:22 -0500
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 09:13 +0200
                Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-18 10:53 +0100
                Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-18 18:47 -0500
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-19 02:12 +0200
                Re: Trouble with laptop display Hank Rogers <Hank@nospam.invalid> - 2025-07-18 19:53 -0500
                Re: Trouble with laptop display VanguardLH <V@nguard.LH> - 2025-07-18 20:45 -0500
                Re: Trouble with laptop display Hank Rogers <Hank@nospam.invalid> - 2025-07-18 21:22 -0500
                mini-PC (was: Trouble with laptop display) Frank Slootweg <this@ddress.is.invalid> - 2025-07-18 19:58 +0000
                Re: mini-PC "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 22:28 +0200
                Re: mini-PC (was: Trouble with laptop display) c186282 <c186282@nnada.net> - 2025-07-18 23:38 -0400
            Re: Trouble with laptop display Robert <invalid@invalid.invalid> - 2025-07-17 21:56 +0000
              Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 09:49 +0200
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 11:08 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 11:11 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 12:22 +0200
                Re: Trouble with laptop display Jack <Jack@invalid.invalid> - 2025-07-18 20:24 +0000
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 22:05 +0100
                Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-18 18:31 -0400
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-19 00:50 +0100
                Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-19 01:35 +0100
                Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-18 19:42 -0700
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-19 15:11 +0200
                Re: Trouble with laptop display Simon <SimonJ@eu.invalid> - 2025-07-19 13:36 +0000
                Re: Trouble with laptop display not@telling.you.invalid (Computer Nerd Kev) - 2025-07-20 09:55 +1000
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-20 02:02 +0000
                Re: Trouble with laptop display Daniel70 <daniel47@eternal-september.org> - 2025-07-20 21:10 +1000
                Re: Trouble with laptop display Simon <SimonJ@eu.invalid> - 2025-07-20 05:00 +0000
                Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-19 21:43 -0700
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-20 05:29 +0000
                Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-20 07:34 -0400
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-20 21:04 +0200
                Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-20 14:40 -0700
                Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-20 20:43 -0400
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-21 04:42 +0000
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-20 19:50 +0000
                Re: Trouble with laptop display Daniel70 <daniel47@eternal-september.org> - 2025-07-21 19:41 +1000
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-21 12:16 +0200
                Re: Trouble with laptop display Daniel70 <daniel47@eternal-september.org> - 2025-07-21 22:26 +1000
                Re: Trouble with laptop display Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-21 17:35 +0000
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-21 19:55 +0200
                Re: Trouble with laptop display Paul <nospam@needed.invalid> - 2025-07-21 17:37 -0400
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-22 00:36 +0200
                Re: Trouble with laptop display Daniel70 <daniel47@eternal-september.org> - 2025-07-22 19:57 +1000
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-22 12:08 +0200
                Re: Trouble with laptop display Daniel70 <daniel47@eternal-september.org> - 2025-07-22 21:38 +1000
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-22 12:46 +0100
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-20 12:54 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-20 20:55 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-20 20:22 +0100
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-20 19:54 +0000
                Re: Trouble with laptop display Simon <SimonJ@eu.invalid> - 2025-07-21 09:02 +0000
                Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-19 21:44 -0700
                Re: Trouble with laptop display Java Jive <java@evij.com.invalid> - 2025-07-20 13:41 +0100
                Re: Trouble with laptop display "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-07-20 17:52 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-20 21:05 +0200
                Re: Trouble with laptop display rbowman <bowman@montana.com> - 2025-07-20 19:56 +0000
                Re: Trouble with laptop display Java Jive <java@evij.com.invalid> - 2025-07-21 12:55 +0100
                Re: Trouble with laptop display Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-20 15:00 -0700
                Re: Trouble with laptop display Robert Riches <spamtrap42@jacob21819.net> - 2025-07-22 02:43 +0000
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 23:25 +0200
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-19 00:07 +0200
                Re: Trouble with laptop display The Natural Philosopher <tnp@invalid.invalid> - 2025-07-18 11:08 +0100
                Re: Trouble with laptop display "Carlos E.R." <robin_listas@es.invalid> - 2025-07-18 21:22 +0200

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