Scanner won't turn on when button is pressed

To unlock your Radio Shack Pro-70 Scanner, you can try the following steps:

1. Turn off the scanner by pressing and holding the "Power" button until the scanner turns off.
2. Press and hold the "Func" button while turning on the scanner again. Keep holding the "Func" button until the scanner finishes its power-up routine and the display shows "Program."
3. Use the number buttons to enter the four-digit unlock code. If you don't know the unlock code, try entering "0000," which is the default code for many Radio Shack scanners.
4. Press "E" to confirm the code. If the code was entered correctly, the scanner should now be unlocked and you should be able to access all functions.

If the above steps do not work, try resetting the scanner to its factory defaults. To do this, turn off the scanner, then press and hold the "2," "9," and "MAN" buttons while turning on the scanner again. Keep holding the buttons until the scanner displays "Factory Test." Press the "Func" button to confirm the reset.
If none of these steps work, it's possible that there is a hardware issue with the scanner and it may need to be serviced or replaced.

Ruby, try pressing and holding on button or you will have to reset.
Check the attached links,
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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. 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.

I also hope you let the calculator dry out thoroughly before replacing the batteries.

1.Check the device's battery level for at least two bars of strength.
2.If the battery level is low, charge the battery.
3.If the issue is not resolved, remove the back cover.
4.Remove the battery.
5.Wait 10 seconds.
6.Press and hold the W key.
7.While pressing down the W key, re-insert the battery.
•The device restarts and after approximately 15 seconds, the 'Recovery' screen appears
•Release the power button but *continue holding the home button*, for another 30 seconds.
Step
Thanks

Have you replaced the batteries and you also need to press the SYNC button inside the battery cover underneath the wii board and the SYNC button on the Wii console at the same time.

Things to check first for a camera that won't turn on are battery contact points, and micro switches that are located on the battery and memory card doors. Troubleshooting tips on other things that need to be checked may be seen here. These tips won't work for every case, but they're worth a try.

these scanners are a little hard to operate i have one of these it took me a while...Ok its because you have it on hold.when you turn your scanner on press your scan button.and your scanner should start scanning...

Have u got a reset button on the back of it maybe a little tiny button try pressing this it may need to calibrate itself

if the scanner is not locked, you can try pressing #*C* then enter 14 and press start, if it is not resolving your problem you need to replace the carriage motor mcu pwb and the power supply pwb respectively.

Here's delorme's forum page on reset options and firmware updates if you so choose:

http://forum.delorme.com/viewtopic.php?t=10995