Question about Compaq tc1100 Tablet PC
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
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
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
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
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
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
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
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
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?
Posted on Jan 02, 2008
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Posted on Jan 02, 2017
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