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First get a multimeter and check if the power is going through the adapter to the end of the cord. The AC/DC transformer should output 32V DC at the end going into the scanner. If it has power, then the scanner power switch or the unit itself has failed. If there is no power passing through the cord, then try a new adapter. (You can find some by Googling - I saw some from various vendors.) If it is the scanner itself that has failed, check if it is under warranty.
If it is under warranty, contact HP for service. They may have the power cords as well but I didn't check that far. Otherwise decide if it is worth the service charges.
I hope this helps.
Cindy Wells (at least I do not think this scanner has a hard power switch on the side of the unit.)
Their is no power save mode on this CB in the terms I think your thinking of. There is a high and low power that deals with how much power the CB puts out when transmitting that will make your battery last longer but this would have no bearing on the issue you are having.
If you are using a power cord all the time then remove the batteries from the CB until you need them. There are two thumb clips you pull down on and pop the compartments off (one is for rechargeable and one is for regular Alkaline batteries).
If the CB is actually powering on and off you have a power feed issue such as a bad connection, a failing power feed socket, a weak inline fuse on the power cord about to blow or something internal is malfunctioning.
The correct part number for just the "brick style" power module (AC Adapter) for an HP Scanjet 3970 is L1970-80003. It is a specific 12V DC 2 Amp module. Today it can be purchased for $18.06 plus shipping from the HP Parts Store. However, if you are looking for just the power cord to your scanner's AC adapter, this brick style power module AC adapter does require a separate standard C13 detachable power cord to the specifications of your area, for instance, in the USA the power cord to connect the scanner to the power module AC adapter is part number 8120-6260, and it is a common power cord for monitors and computers. I learned all this because I had a scanner error message when I tried to use a different power module on the HP Scanjet 3970 when I lost the power cord to the original module. I hope this info helps somebody else, too.
Most likely cause of the "Scanner could not be initialized" error on the HP Scanjet 3970 is due to using an incorrect power adapter and cord -- the only power module and cord that work for the HP Scanjet 3970 are these part numbers:
8120-6260 for the power cord
and L1970-80003 for the power module / AC adapter
I hope this info helps you.
Your part should be Epson AC adapter A241B 15.2v 1.4A 30W. The power cord is a generic type cord common with printers and scanners, it should be easy to find if the power adapter doesn't come with one already. You may be able to find it cheaper somewhere online like Ebay.
There's a shop in the UK or Sweden called Clas Olsen that sell a range of multi headed adapters, you have a pack that has the usual ones you see and they have a pack for other adapter heads and one of them fits the V100. How do i know? Cos I bought one for my scanner but it will set you back by £25.
DO NOT use the HP power adapter that is 19V / 3.95A. That is too much power for the Scanjet, which is expecting 12V DC (and a much lower amperage). It's possible that hooking up this power adapter may further damage the electronics inside the scanner. If the second adapter has stopped working then it is possible that the internal circuit board has damage already and another adapter may not work. If you have access to a multimeter / voltmeter you could check for the 12V coming from the adapter. If you're getting the 12V, then the internal circuit board to the Scanjet is probably defective.