I made my 83+ LCD royal blue (no, not a dark almost black-blue like two-color pong)! What you do is go in to CalcSys. The key sequence is:
4
6
6
6
6
6
6
6
6
6
6
1
2
3
[CLEAR]
[CLEAR]
[CLEAR]
Now, go into the Detached Solutions Calender APP (not the MirageOS prgm). You will see royal blue lines. I don't know how this works (if anyone from detached solutions would explain this), but it is cool. And don't backup your memory, because it will reset it. :^p

Whoa! It worked! It even drew outside the screen! That's really cool!

I've seen it happen on the 82, 83+, and 89. It's possible that all TI calculators have it, maybe something in the hardware. I would appear that it only affects ASM programs; I've written a couple routines that would do this. The GameBoy does this to when shutting down. After showing a royal blue line, the line turns black and then goes out completely.

litc!

Fear the Blue Lines of Death, for they lie under a royal blue cloth of deceit and screw up your LCD. check the assembly 83 archives for more info.

I tested this now... on my expensive SE.... and GOD IT WAS CREEPY!!! It drew ultra high-res lines on the top of the screen.... OUTSIDE of it... a scatter with multiple layers of lines... and a lot of other screwing stuff... It seems directly damaging to the LCD, but hell, maybe that's just my paranoia. So how can this happen? I didn't think a software application could give an overvoltage to the LCD or something....

How do you do it on an 89?

Yeah! I wanna try it on my 89 too! Or my 82... or the evil school calculators!! BWWAHAHAHAHAA!

Does anybody know if it works with VTI?

Does anyone here know of a way to completely, I mean completely, screw the flash. This would be sad for the user of the calc. From what I saw in the Flash disassembler for the x3 series of calcs, it seemed that the BOOT codes were in flash as well.

And oh - I never screwed someone's calc. I FIX them. I just want to know if the above is a reason to be extra careful

You fix them?
We are in the same league...
:-)
For the sake of the world, continue fixing!

Traitor...

Me too. My whole class thinks (or knows ;) ) I'm a real expert when it comes to calcs. So when I can't show of with new programs, I show of fixing their calcs for 'em.
My maths teacher actually promises other people in my school (some of which I don't even know!) that I'll fix their calcs.

I know how THAT feels.

In Math Class:
Student:Teacher, my calculator won't graph that function
Teacher:Nick, can you help Student.
Nick:I guess.
(I fix the problem in 1.5 sec)

If you wanna screw the flash, erase the certificate mem. The calc will refuse to boot w/o it.

How do you do that?

how about putting "C9h" into the first line of flash ROM code after boot?

Screw that...
The cert mem is _read_ protected, so you can't even see what is already there, let alone _change_ it, altough you might be able to hack HW2Patch to write anything anywhere, then you could either write directly to cert mem or hack the TRAP #0xB (archive) function in the flash, and then call it from a user program to screw the entire flash.

i dont think anyone has talked about this yet but..
but i found the easiest way to clear someone else's ram without connecting a cable or anything like that is to simply have make a call on your mobile have your mobile near their calculator...
this actually happend to me when i was talkin on the phone and doing homework.. and my ti-83 suddenly said "Mem cleared"
its quick and simple.. if your sneaky, they wont even know it was you >=)

I find that kinda funny.

How long does it take?

I've got to try this...

Well. After my GSM 900/1800 T29 phone lying on top of my TI-83 Plus Silver Edition a few minutes, nothing has happened with it at all. It has a big layer of foil (shielding) on its inside, so that may be why. What calc did you succeed in reseting this way?

He mentioned it was his TI-83, maybe the phone resonated some approx 8 MHz waves that inferfaced with the processor in a way it wasn't capable of being interfaced, causing a Mem Reset...just my nutball theory.

it was on a normal ti-83 and a nokia 8250
its happends in a few seconds if you have the phone right next to the calculator =)
maybe the new ti's have something to stop this from happenin?

as far as I can tell a phone has no reason to output anything as low as 8MHz - at a guess the power transmitted by the phone a the normal 900Mhz / 1800MHz should be enough to intefier(OK can't spell) with any comp. equip. such as wiping ram.