Question about Compaq tc1100 Tablet PC

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Chequered screen For some time now, the screen has gone chequered. Everything works just fine but you hardly see anything. The screen is coarsly pixelized and fuzzy. Smells like a hardware problem. It happened a couple of times some year ago. Since then I havn't used it, until recently. Now it is only chequered. I tried to carefully adjust the flat panel cable and its connectors inside but that didn't change anything. Useful maintanence guide at "http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00681631/c00681631.pdf?jumpid=reg_R1002_USEN" 1) what else can i try 2) does the small internal batterypack called "bridge battery" have anything to do with this? 3) has anyone experienced this before? Thanks for great site, /Anders F

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  • joemc Feb 01, 2008

    Having a problem with several tc1000 tablets - video is very fuzzy - one is this way regardless whether it is docked or undocked, one works ok on dock in most instances, but in undocked mode, you can barely see anything on the screen. When you first boot the tablet on, all kinds of characters pop up on screen, then everything is totally fuzzy. Any easy fix or solution, these are no longer under warranty.

  • Anonymous Feb 12, 2008

    same problem as described above, cannot find any solution.

  • frisman Mar 02, 2008

    Similar screen problem..

    Hi,

    I have a TC1100 that had a bad screen (display SUPER dim, HP logo barely visible on boot) so I just purchased and installed a new screen (which comes with the whole bezel, inverter, display, everything on the top half of unit) Same thing happens, barely visible screen and no backlight. I have played with every cable and nothing. Anyone else had this problem or know how to fix it, I would really appreciate any help. Also, the external video port to another monitor does work which tells me that the video adapter is functioning.

    Thanks.

  • neilcosta99 Jul 01, 2008

    My screen started having this chequered screen about two months ago. It has also started just crashing and giving me blue screen of death randomly as well. I am not sure which solution to chase down - replacing wires, video card, etc? Any help would be great. In Boston area and want to have repaired.

  • clanwarrior Jan 08, 2009

    Help me also, I have the same problem

  • paolo-bf May 11, 2010

    hi tabletmaven,
    i found your post quite useful, you said that to hold the
    battery and screen in a certain way at startup may be quite helpful,
    could you possibly tell me in which way you should try to hold battery and screen,



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I have a tc1100 with the exact same issue. The problem I noticed, also, that when attached to the keyboard and in the upright position I could get clean boot (sometimes) by flexing the tablet a bit.

I discovered when I disassembled the unit the bracket assembly that connects and releases the keyboard from the slate was the culprit.

When I removed that and lifted the motherboard a bit it booted fine ... when I replaced the assembly, the checkered screen appeared again. I again removed the bracket and got it to boot fine. Apparently, it was pressing the motherboard against the frame and shorting out the video card.

Posted on Dec 09, 2008

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I have this checkerboard problem, and I was able to temporarily solve it by putting the TC1100 in the fridge for 20 minutes before bootup. It must be that hairline fracture in the motherboard, and warping from the heat. My device will not start up normally unless I do this. I would like a real fix though.

Posted on Jun 27, 2008

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Hi,
I fixed mine finally!!! I ordered a cable kit and replaced the cable from the display to the motherboard (I actualy replaced them all but that one was the culprit.) Also, I learned that if you put the cable in backwards :) into the motherboard, it will appear very dim as it did with the bad cable. I believe that this is because the backlight inverter is not active, which in other posts here, may mean that the inverter is bad. Just a thought...

Posted on Mar 12, 2008

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I work with these computers on a daily basis. For checkered screens it is a bad connection with the keyboard/system board usually caused by a loose keyboard bracket or hinge. This has been known in some cases to cause a hairline crack in the system board near the graphics controller which gives a checkered/low resolution screen. The problem is not fixable; you will have to buy a new system board and sometimes a new keyboard.

Posted on Apr 05, 2008

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Ok. reading other solutions. \ helped me figure Out the problem. There is a hairline crack, that that's what i did not notice. i only heard the large sparking the motherboard would give. in Suggesting if anyone with good Soldering skills could fix their motherboard. (that is if You can open your tablet) in going ahead with this and tell You what happens later,

Posted on Jul 04, 2009

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Can anyone tell me where I can get a replacement system board for the tc1100 and if they are even available now?

Posted on Sep 20, 2008

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Pixelated and fuzzy screen Issue note.
The tc1100 and tc1000 borrow ram from the onboard ram installed at the factory (or upgraded) and if this RAM is bad or failing in the area that feeds to the Nvidea integrated card, well, you can get this effect. I dont remember if the card uses the first or last part right now.
It can also be caused by a bad video card, and no, you cannot replace it as it is fixed to the Mother board (mainboard) unless you are a very very qualified board tech. The RAM you need to check is attached to the mainboard under the rear cover which will have to be removed. Download the manual at HPs site. For the tc1000 this RAM is on the bottom of the board, so you have to remove the mainboard completely.
You will need patience and known good RAM!

Posted on Apr 05, 2008

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I have a TC1100 that started doing this right after I used the keyboard controller update, which BTW I don't think is necessary and I only did it out of a nerd compulsion to make sure everything was up to date.

I find that if I boot with the keyboard detached it will usually boot ok. The moment I get it booting clear I reattach the keyboard.

Because this started after I updated the controller BIOS and I have 4 identical machines BTW, I believe this is also related to a poor BIOS fix.

Obviously these symptoms can be created by numerous factors so this may not apply to everyone.

Posted on Mar 15, 2008

The problem is actually due to the connection between the keyboard and the systemboard. This is why if you pull your screen towards you when you turn on the computer it will often work but not another time. Usually the fix is to replace the system board but when that is not an option you could always try reinforcing the solder on the systemboard port that connects it to the keyboard.

Posted on Mar 11, 2008

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Not sure of a fix but it appears that the heat generated by all the components under the screen may be warping certain components. I have found that if on startup, i hold the battery and screen in certain way I have successful starts. This is not idea, but to have it checked out and repaired (out of warrantee) could be very expensive. I noticed that the tc4400 now has the components (battery, harddrive...etc) and the screen seperated. I think they figured it out and did not put out a notice to the early adopters.

Posted on Feb 03, 2008

I've got one and the same happens. However, there are instances when it works fine. Quite random.

Unfortunately, I've no idea what you can try but I have read that it's a faulty video memory chip problem.

I'd like to know what that specific chip is and maybe try to replace it.

And I've not heard about the bridge battery before.

Any joy with anything of late?

Steven

Posted on Jan 02, 2008

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Posted on Jan 02, 2017

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