Question about Toshiba e740 Pocket PC

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Memory loss/reset

I have a reconditioned Toshiba e740 (Windows 2002). It worked great for a while, but recently it keeps going back to factory settings. At first it just seemed happen whenever I took it out of the cradle, but now it happens all the time and I cannot even get the backup reloaded before it will reset itself and I will have to go through the whole setup process again (although I have not tried leaving it in the cradle and resetting it there recently). Can anyone suggest what the problem is and how I can fix it?

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Re: Memory loss/reset

If prior posters are correct that it is the internal battery (not the easily replacable, removable one, but the one which is supposed to save your data long enough to swap "external" batteries), and that the internal battery _is_ the ML 1220, it should be an cheap fix. That sounds like a logical cause and which is a problem I've had on other electronics and repaired quite easily that way, including CMOS batteries on a number of desktop PCs and some smaller cheaper gadgets. In any case, assuming the internal battery dying is the problem and that the ML 1220 is the replacement part, then it is available at PcHub.com, impactcomputers.com and other suppliers. They show varying prices and makers, but include details on voltage, resistance, and other specifications. They also show them as being in stock. My understanding is that with batteries as long as the amperage, voltage, resistance, and such are the same, they are generally interchangable. I could be mistaken, and if so, I hope someone will correct me. I hesitated to be overly confident, since I just did a quick google search and turned up those results.
http://www.google.com/search?q=ML1220&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7HPID

Posted on Apr 03, 2009

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Re: Memory loss/reset

Have a suspicion that this whole issue revolves around the fact that the E740 uses a ML1220 coin-type lithium manganese dioxide rechargeable battery which is a 3V battery using specially treated manganese dioxide for the positive material, a lithium-aluminum compound for the negative material, and a specially formulated organic electrolyte. This is found under the left lower cover set on it's edge and like a home PC is I believe the CMOS battery which is rated at 1,000 cycles of discharging to 10% of nominal capacity (Depth of discharge = 10%). The total discharge capacity is quite high at 100 times nominal capacity. Supplies a nominal capacity of about 95% even when stored at 20 deg. C for roughly five years according to accelerated test conducted by Maxell). And since organic electrolyte is used, the battery has superior leakage resistance (shipped fully charged). I have the same issue with my unit and decided to open it up and find out about this battery. I am almost certain that this battery is no longer holding a charge and therefore always crashing an resetting. I have had the same experience with my old Handspring unit as well as an old PC. I would appreciate hearing from Toshiba or anyone else where one can acquire a replacement ML1220 as it is only supplied to manufacturers and not consumers.

Posted on Sep 08, 2005

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Re: Memory loss/reset

I am not sure about that but if there is no power supplies the data will be lose. Try to contact service partner and I am sure that they can give you more precise information about this issue.

Posted on Sep 08, 2005

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Re: Memory loss/reset

As far as I know this can happen if the PDA lose the power supply

Posted on Sep 08, 2005

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Sep 07, 2005 | Toshiba e740 Pocket PC

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