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From: Jay Hall <Jayhall5397@msn.com> To: Teacher2Teacher Public Discussion Date: 2011112507:11:53 Subject: TI83 Plus Black Screen Had black screen. Tried all solutions: batteries, init., software, etc. Tore apart. Noticed flat ribbon cable from main board to screen not installed straight. It was slightly left, with screen ribbon cable contacts left of main board contacts. Those cables are not soldered...they are held on by tape.This is just the normal cheap-Chinese methodology of just slapping stuff together as cheaply and quickly as possible, with no regard for quality. (Makes it easier for them to surpass us when they sell us junk. It breaks down, they sell us more! We go broke.) Anyway, I ripped that flat cable off of both ends. I CAREFULLY and slowly cleaned the sticky residue from all contacts. I had to scrape a bit, but BE CAREFUL! After cleaning, it left nice solder pads. I cut small-gauge multi-strand insulated ribbob cable down to about 1/2" sections, and separated the individual insulated wires, and stripped each end about 1/16". I then removed all but one strand of wire from each. (That will make it more flexible in its insulation to bend back over, and give it space for everything to fit Soldered, first, to the main board. Trimmed everything even, soldered to the corresponding connections of the display board. Reassembled the calculator, installed batteries, turned it on. It worked. If you've tried EVERYTHING else, look at that cheezoid ribbon cable. It could be installed in the normal "we don't care about quality, let's rip off Americans" sloppy Chinese-way, or it could just be that the adhesive is coming loose, breaking contact. WHY do we buy poor-quality garbage from China!? Has it not occured to anyone that the weaker we get, the stronger they get?
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