How do you remove p.e off screen

The calculator may be too old and some hardware damage may have occurred. Old age, like everything else.

I'm not sure if it is the only solution, but I had the same problem and I replaced the batteries. My HP35S works fine now.

Previously, however, there was no "battery" annuciator on the screen. This calculator went four years without a bettery change. My HP48GII, on the other hand won't go two months without a change. Go figure.

if you kept the batteris inside for long time it could be that they leaked inside when it happend there is some damage inside.
update for the OS sometimes helps

i fix this calculators

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Try to reboot your calculator to see if it helps by doing this:
*Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR], reinsert the AAA battery and then turn the calculator on. The calculator should display the message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message. *
Let me know if it helps or not.

the batteries have been discharged u need to change the batteries.....it will work properly....

Hi,
Check that the terminals in the battery compartment are clean and shiny. Remove any powder left after battery leakage. Insert fresh batteries in calculator. Make sure you respect the polarity diagram. +-+- (Many malfunctions come from incorrectly placed batteries).

To adjust the screen: Darken or lighten display

To darken screen
Press [2nd] key and release it.
Press and hold [UpArrow] until screen is dark enough.

To lighten screen
Press [2nd] key and release it.
Press and hold [DownArrow] until screen is light enough.

Hope it helps.

Hello,

RAM cleared means that the machine removed all old values stored in variables. And it is wainting for you to start calculating.
Enter any operation
1[+]1 should give you 2.

If the keys do not answer when you press them and nothing shows on screen you the calculator may have to be repaired.

Hope it helps.

I had the same problem. I remove all four batteries and the battery backup that is underneath the little phillips screw in the battery compartment. I immediately replaced it and the other batteries and everything worked. FYI, others have called for keeping the batteries out for 8 hours.

If the screen in busted its easier/cheaper/quicker to buy a new calc on ebay for $20.

TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on at all. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.