 Posted: Sat Dec 08, 2012 10:06 am Post subject: calc 10 years |
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| This calculator is working about 10 years, you are be satisfied from that. | |
| Posted: Sun Sep 02, 2012 6:21 am Post subject: |
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| I just successfully fixed my TI which had about half of the horizontal lines completely dead. I opened the calculator and used hot air gun to carefully warm the connection between the black ribbon cable and the board behind the LCD. All the bad connections were between the board and the black folded ribbon cable. After warming it up I used a blunt small plastic object to glue the ribbon back to the board. The purpose of the hot air is to melt the glue.. The connection in question is hard to access because it is between the fold so you have to remove some of the black tape before you can stick something between the folds and access the connection. Good luck  |
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| Posted: Sun Sep 02, 2012 5:06 am Post subject: |
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| The screws are TORX-6 I think, my screwdriver says T-6 and was perfect for removing the bottom screws | |
| Posted: Sat Aug 11, 2012 10:50 am Post subject: ti86 case screws |
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| the only screws to deal with are 2 bottom case phillips head screws. that may be different in other versions Im not sure then the 1 memory battery phillips screw. then slide thumbnail up the slit on the sides to uncatch the keeper tabs all around the perimiter of the calc.. a tool could be used for this but it may scratch the calc if you slipped.. the tabs are plasctic hooks that catch the bevel edge of the back cover. if you break them you get a calc that 1 wont stay closed or has to be taped or glued and that ruins the look and value.. |
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| Posted: Tue Jan 31, 2012 7:05 pm Post subject: |
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| In case you hadn't noticed, aaroncorey is an expert at "cutting & pasting." | |
| Posted: Tue Jan 31, 2012 5:14 pm Post subject: |
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| @aaroncorey: I'm having trouble opening the calculator because I can't identify the type of screws that are used at the very bottom of the case. What kind of screw driver did you use to remove them? They look like Torx screws, but I can't tell what size and I'd like to know before I go and buy a new driver or set. | |
| Posted: Sun Jan 29, 2012 9:02 pm Post subject: |
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| @iamdenteddisk, what type of screw does the TI-86 use at the bottom of the case? It looks like a Torx 6, but the bits I currently have are too thick and short to fit into the plastic hole, so I'd like to confirm the screw type before buying a driver for it. | |
| Posted: Mon Sep 19, 2011 7:22 am Post subject: ti86 horizontal lines in the display |
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| mine did it and here is the fix, the problem was caused by the foil shielding inside the calculator was shorting the traces and chip pins. 1) open the case by removing the bottom screws and the screw near the backup battery and then remove the battery's. there are three sets of case snaps the middle on each side and an inch from top and bottom on both sides slip a flat screwdriver in the cover slots at the widest point and twist, "give it a little presure" but dont crack the case. 2) I folded three little squares of paper "the size of the board" and place them between the board and foil. 3) reassemble the calc and put the battry's and screws back. this solved my problem hope it works for you! |
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| Posted: Fri Oct 23, 2009 11:54 am Post subject: Re: TI-89 issues |
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Thanks for the reply! I've contacted them after doing a hard reset, because the problem still persisted. They said that it is "a pixel issue which is not fixable if the calculator is no longer in warranty, because we do not repair calculators." Hardware problem, unfortunately. Too bad!  |
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| Posted: Thu Oct 22, 2009 12:18 pm Post subject: TI-89 issues |
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| Could be .............. Cold Solder joint LCD going bad if Bad LCD you may attempt to contact TI for price on a replacement also ask if there is a Service manual to check out the voltages and any Oscilloscope data. unless they are doing propietary repair  |
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