New batteries, turned it on and screen is completely black.
As stated in the title, my screen is now completely filled in with pixels, no key i push works or changes anything. I need it fixed really soon cauese my exam is in 2 days..
I hope someone can help me!
Texas Instruments TI-83
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I just had this exact problem so I reset the memory as instructed below. Know I am back in business.
A memory reset will return the HP 48 to its factory-default state, which will erase all stored user memory. Use this feature very carefully.
If necessary, turn the calculator on.
Press and hold the ON+A+F keys simultaneously.
Release all three keys at the same time. This should cause the calculator to display the message "Try to recover memory?"
Press the A key to attempt to recover memory or the F key to erase the user memory. When A is pressed, occasionally the objects in memory are recovered in new sub-directories of HOME labeled D.01, D.02, et cetera, although there is no guarantee that all of the variables will be recovered. Pressing the F key will cause all information stored by the user to be erased from calculator memory. This will also affect any RAM card that is merged with main memory. If the card is not merged or it is write-protected, it will not be affected by this reset.
Hardware symptoms and solutions
I. The display screen has a blue/purple blotch of color, even when the unit is off
The screen is damaged, and the calculator requires service. Please contact HP .
II. All of the pixels on the screen are lit (blue)
Try to adjust the contrast by holding down the ON key and repeatedly pressing the [ - ] key.
If the screen is still dark, try to halt the system using the keyboard.
If this does not correct the problem, try to reset the system using the reset hole with the batteries removed.
If this does not work, remove the batteries and let the unit sit for 48 hours. After 48 hours, replace the batteries. If the problem persists, attempt a memory reset. Although removing the batteries for 48 hours should erase the user memory, performing a memory reset will ensure that the calculator is reset to its factory defaults.
I had the same thing, but on a monitor. It means some pixels on your TV are heavily damaged, meaning your tv fell, or something got thrown at it or just hit it hard, or just because the box you bought it in wasn't completely sealed which damaged the device in transport.
Those pixels cannot be recovered, meaning you would have to use your warranty (if you still have it, or if it is still valid) to send this back to the company (or bringing it to the store you bought it in) to get a new one.
There's a 'data control' and/or 'address' problem that's developed. Pixels depend on voltage, control, and data coming too their designated address.
A digital circuit feature called a 'DATA_ADDRESS_ BUS" are responsible for 3 criteria: Delivering voltage, control, and data to each pixel in less than a second.
1) If voltage fails the pixels don't light up. They appear black in color (their 'off 'state)....numerous pixels that don't light up look like a black line. But their actually individual pixels with no voltage.
2) If control fails then all pixels are white in color (their 'on' state). Without control the pixels can't adjust properly to high or low 'state', meaning brightness and dimness. This looks like a white line vertically on the screen.
3) If data fails then the pixels can't adjust to the proper color at the proper time. This appears as a line that changes color out of sync with the entire picture.
Have a technician look at the pixel address registry circuits. As well as control and linear circuits....the problem is somewhere in there!
In the digital world, you can't have a 4:3 aspect ratio DVD title (720x480) on a 720p (1280 x 720) / 1080p (1920x1080) display without some kind of centering or stretching to some extent. (square vs rectangle) Now, on a 16:9 aspect ratio title (wide screen format) you should have any scaling issues regardless of the pixel resolution. Despite what the sales person told you, trans-coding ("upconverting") lower resolution titles to a higher resolution does not increase the quality of the image. Any attempt to do so would be only to try to reduce block noise and any kind pixelation at higher resolutions. (blurring square pixel blocks)
In the analog world, the quality of the image is based on the encoder and signal depth. If your TV excepts HD analog, you might be able to have your cake and eat it too. That would force your display to convert an analog signal into a digital resolution, letting the TV hardware do all the trans-coding. Manufactures are completely phasing out analog signal receiving, but might have the RGB RCA connectors for backwards compatibility. Eventually, it will not be supported and you will be forced to buy higher resolution content.
1. Remove 1 AAA Battery 2. Press and Hold 'ON' for 30 seconds 3. Replace AAA Battery 4. Adjust Contrast to appropriate level
If this fails, try again with ALL Batteries removed including the backup Lithium Battery.
If all else fails, try the following reset procedure:
1. Remove ALL Batteries (inc. Backup) 2. Let Calculator sit with no batteries for 2~4 hours. 3. Hold 'ON' for 30 seconds. 4. Replace all the batteries (May be good idea to use new batteries just in case old ones were dead) 5. Turn on Calculator 6. Change Contrast to appropriate level
- Remember to use correct batteries or calculator may not work. The correct batteries are Alkaline, Rechargable Batteries are TOO WEAK, Heavy Duty batteries are TOO STRONG.
Please read the WHOLE of this guide before starting.Software Method
Try running pixel fixing software. Stuck pixels can often be re-energized by rapidly turning them on and off. If this fails, complete the following steps.
Turn off your computer's monitor.
Get yourself a damp washcloth, so that you don't scratch your screen.
Take a household pen, pencil, screwdriver, or some other sort of instrument with a focused, but relatively dull, point. A very good tool would be a PDA stylus.
Fold the washcloth to make sure you don't accidentally puncture it and scratch the screen.
Apply pressure through the folded washcloth with the instrument to exactly where the stuck pixel is. Try not to put pressure anywhere else, as this may make more stuck pixels.
While applying pressure, turn on your computer and screen.
Remove pressure and the stuck pixel should be gone. This works as the liquid in the liquid crystal has not spread into each little pixel. This liquid is used with the backlight on your monitor, allowing different amounts of light through, which creates the different colors.
Turn on the computer and LCD screen.
Display a black image, which will show the stuck pixel very clearly against the background. (It is very important that you are showing a black image and not just a blank signal, as you need the backlighting of the LCD to be illuminating the back of the panel).
Find a pen with a rounded end. A Sharpie marker with the cap on should be fine for this.
Use the rounded end of the pen to gently tap where the stuck pixel is - not too hard to start with, just enough to see a quick white glow under the point of contact. If you didn't see a white glow, then you didn't tap hard enough, so use just slightly more pressure this time.
Start tapping gently. Increase the pressure on the taps gradually for 5-10 taps until the pixel rights itself.
Display a white image (an empty text document is good for this) to verify that you haven't accidentally caused more damage than you fixed.
If the pressure and tapping don't work directly on the stuck pixel, start moving outward around the stuck pixel. If you see the pixel flicker while doing this then you know where you can focus the pressure and tapping techniques rather than directly on the pixel.
Many people report success with this technique but these instructions won't work in every case. It may take a few attempts to make sure you are pressing exactly on the stuck pixel.
These instructions will fix "stuck" pixels, not "dead" ones. Dead pixels appear black while stuck pixels can be one constant color like red, blue or green.
An alternative, but similar technique involves gently massaging the stuck pixel with a warm damp (not wet) soft cloth.
Alternative technique to tapping: Using a rounded pencil eraser, push with moderate pressure into screen at stuck pixel.
If these instructions don't work, you can hopefully get the monitor replaced through your manufacturer. If your monitor falls under the specifications of replacement, get in contact with the manufacturer to set up replacement plans.
Do not attempt to open the monitor as it will void the warranty and the manufacturer will not replace it.
Make sure you don't get any electrical equipment wet or it may break.
Some people claim that touching the screen can cause more pixels to become stuck, although this has not been proven.
Be prepared to suffer a complete loss; you may crack the glass when tapping or putting pressure on an LCD assembly.
**Rytech assumes no responsibility if you cause futher damage to your product whilst following this guide. If in doubt, contact authorised service personell**
i had the same problem. If you hit 2nd down 2nd down 2nd down and keep repeating untill the screen clears it should solve the problem. i tried the other solutions that tried clearing the memory and they didnt do anything but erase the equations i had previously put in it (great). But this should work.