I've recently purchased this unit used, and I was in formed of the problem , that is when you press the power button, the only thing that happens is a beep , no screen appears. Also is it came to me with no data card.
Push the power button to turn it on then count to 5 then hit enter. Then count to 5 again then hit enter. Once there hit the power button with a real quick press. The power button is also the screen brightness button. Someone may have turned it all the way down. OR the back light could have gone out.
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Most stock units are equipped with a US & Canada map if purchased in the US. Yes, the unit will work in Italy but you will need to add a Europe Map on an SD card, as the internal memory may not be large enough to hold both maps.
The Street Pilot line was one of the first automotive GPS devices from Garmin, and has got to be 8+ years old. Garmin contracts with Navteq for map software. At one point, Garmin needed to have Navteq compress their new maps so that they wouldn't need to increase the amount of memory in the GPS units and still be able to include all the way points, and new features such as junction view, traffic receivers, text to speech voices, etc. These new maps have an "NT" descriptor in the title. "NT "stands for "New Technology". Non-NT maps are no longer produced.
The new Garmin GPS hardware had to included the ability to decompress maps "on the fly" for display on the screen. As a result, the NT maps will not work in the older Garmin devices.
Your best bet is to either use the Street Pilot - knowing that the routes may no longer provide accurate information, or purchase a New, Refurbished or Used GPS. Garmin offers "Lifetime Maps" as an option for nearly all NT capable GPS units either as a subscription after GPS purchase, or "in the box" when buying a Garmin GPS. You'll get FREE map updates for that GPS up to 4 times per year. This assures you of always having the most recent maps available in your GPS. Look for a model that has "LM" in it (ie: nuvi 1490LM). If it has a "T" in the model name (ie: nuvi 1490T), it has Lifetime Traffic. If it is listed as "LMT" (nuvi 1490LMT) it has both Lifetime Maps and Lifetime Traffic.
Try to charge the unit for 4 hrs by using a wall adapter and then try power on it again and if still the same after you full charge the unit try to contact the manufacturer check if there is a latest firmware update for the unit.
I have a c340 and instructions say: if your unit locks up. press the power button to turn off the unit, then press again to turn unit back on. If this does not help, reset by the following: place your thumb nail in the groove located under the Garmin logo on the face plate, gently pull off the face plate, press the reset button, turn the unit back on and it should operate normally
Try recalibrating the touch screen. Turn on unit while continuing to press the power button for about a minute. You will then be prompt to touch a series of dots on the screen. Once prompt to do so, release the power button and touch the dots. Press OK when calibration is complete. The unit will continue to power on. Good Luck.
I followed the instructions of the Online manual for the Garmin Street Pilot c-340, I removed the faceplate of the Street Pilot and then using my thumb pressed down on the reset button. I then pressed the power on button on the side of the device- the screen lit up, I then plugged one end of the USB cable into my computer and the other end into the device. The information on the screen of the device indicated the Lithium Battery was charging properly.
Garmin has issues with the newer (ROHS Compliant) cards, so If you recently bought this card get a replacement from garmin.
I had these issues too with a 256 MB, garmin replace the card with 2 128MB cards, worked fine after that.