Black Screen of DOOM

avatardelta · Post by **avatardelta** » Tue 18 Oct, 2005 9:34 pm

okay i was coming into my math class for some help, and someone came to my teacher with a calculator problem. i heard this and kinda offered my help.

the problem: the screen is black. it's not the contrast, cause i check that.
i have taken the batteries out, including the lithuim back-up, then later that day i put the regular batteries back in, still had a black screen.
don't know what is wrong. just a black screen.
its a 83+
thank you.
p.s. if it can't be fixed the teacher will sned the calculator to texas instruments for a replacement.

Jim e · Post by **Jim e** » Tue 18 Oct, 2005 9:39 pm

Does it turn off immediate after or is it always on and black. Try[ON]+[del] If the homescreen doesn't come back or the waiting for flash then doesn't either, your teacher should send it back.

currahee · Post by **currahee** » Wed 19 Oct, 2005 2:27 am

Funky LCD/ OS? If it's not the contrast and you did a hardcore reset... then the problem might be with the hardware more than the software.

Can you at least link the calculator correctly?

lecks · Post by **lecks** » Wed 19 Oct, 2005 7:29 pm

contrast and batterys are software? hmm never knew.
does the calc communicate with a computer?

KevinJB · Post by **KevinJB** » Wed 19 Oct, 2005 9:01 pm

contrast and batterys are software? hmm never knew.

Was that a bad attempt at a sarcastic insult

You might be on to something with the whole 'link with comp' thing. Does TI-Connect recognize a calculator on the other end?
Try leaving out the batteries for a whole day, you seemed to implicate it was just an hour or two.
Also, try re-installing the OS. As a last measure though.

DigiTan · Post by **DigiTan** » Wed 19 Oct, 2005 9:06 pm

What was it doing before all this happened? Running any ASM progs?

currahee · Post by **currahee** » Thu 20 Oct, 2005 1:36 am

ASM should not screw up a calculator that bad. Unless if it somehow went and changed the bootcode or OS so that it makes it impossible to replace a damaged OS.

These calcs really need a BIOS...

lecks · Post by **lecks** » Thu 20 Oct, 2005 3:15 am

maybe someone put the blue lcd program and used it with the start up app and that way when he turned it on again it turned black/blue and if u remove batteries then it will still stay like that.

threefingeredguy · Post by **threefingeredguy** » Thu 20 Oct, 2005 3:21 am

They do, pressing delete and maybe some other keys while removing (or replacing) a battery restores the OS because its stored on the ROM chip and can't be overwritten.

lecks · Post by **lecks** » Thu 20 Oct, 2005 4:11 am

on+delete

currahee · Post by **currahee** » Thu 20 Oct, 2005 8:50 am

threefingeredguy wrote:They do, pressing delete and maybe some other keys while removing (or replacing) a battery restores the OS because its stored on the ROM chip and can't be overwritten.

I should makemyself clear: A computer grade-bios. Like press F1 for sys options

threefingeredguy · Post by **threefingeredguy** » Thu 20 Oct, 2005 3:12 pm

Aha. Indeed, but that would require several things. You do know the calc doesnt shut off right? It powers down the lcd then "halt"s until an interrupt from the linkport or On key revives it. Maybe a bios after a ram clear.

avatardelta · Post by **avatardelta** » Thu 20 Oct, 2005 9:40 pm

lots of answers!
lol
well it is a different students' calculator. i don't know what she was doing before this happened.

i have tried on + delete and taking ALL the batteries out and leaving it for a few days. there is still the balck screen.
i guess i'll just tell her to send it back to TI
thanks.

lecks · Post by **lecks** » Thu 20 Oct, 2005 9:47 pm

yeah if u send it back to ti you get a brand new *not defective* calculator.

currahee · Post by **currahee** » Fri 21 Oct, 2005 1:31 am

threefingeredguy wrote:Aha. Indeed, but that would require several things. You do know the calc doesnt shut off right? It powers down the lcd then "halt"s until an interrupt from the linkport or On key revives it. Maybe a bios after a ram clear.

Of course! the d@mned thing works just like my PDA. They dont just off- just go on standby.