Question about HP iPAQ h6315/h6365 Pocket PC

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I have replace my main battery and it showing 100% charge but I am facing bit trouble.My( PDA HP IPAQ 6365) battery not giving standby. what is backup battery? It is showing 0% charge? please help

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The backup battery is not user replaceable. If you have some electronics experience you could open the device and replace it yourself but it involves cutting out the old battery and soldering in a replacement. An easier solution is to take it to a phone repair shop and get a quote to replace the battery, probably around $ 60. They may even give you a 3 month warrantee.

Posted on Apr 30, 2011

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Hello,

I'm sorry but the HP Ipaq 55xx series store data on a volatile ram based memory. Unlike a nand flash (like usb sticks, memory cards etc) this memory will hold data only as long as it's powered on. If your main battery gets empty you should still be able to retain your files for some 10-20hrs with the backup battery (if it's ok itself and not depleted). After this time the power to the ram memory is cut off and all data is lost.
The problem you face is somewhat related to that backup battery, as it appears it's unable to do it's job and maintain the power to the ram memory at least some 10 hrs. You should have that battery replaced.

There is no way to recover the data from the ram memory as it is stored as an electric charge over some memory cells in the ram chips. When there is no power, these charges dissipate and the pattern is lost.

I'm sorry for having to give the bad news.
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I Also Had The Same Problem. Now I Fixed It. Go To Power In Settings. Click On The Advanced Tab. Uncheck The Box Which Says "Turn Off The Device If Not Used For" Box. This Will Solve The Problem. It Solved Mine. Thereafter Once, My Backlight Did Not Switch On. Fix This By Going Into Backlight Settings And Uncheck The Box Which Says "Turn Off The Backlight If Not Used For" Box. This Will Solve It. Then Soft Reset The Device To Change Settings. To Soft Reset, Find A Small Hole In The Left Hand Side Of The Device. Put Your Stylus In And PRESS ONLY ONCE. If You Keep It Pressed, Your Device Will Hard Reset. Don't Do That. Just Press ONCE.

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If theres no effect contact your dealer for further assistance. If you need instructions on how to reset your device drop me a line :)

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1 Answer

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Hello,

I had some similar experiences with these ipaq's when I was working in a specialised service center. I'll try to give some help or tips through the internet, altrough if i could have seen or diagnosticate these pda's myself it would have been more easier. First of all these problems have 2 main causes. Most of the pda's comply with one of them, it is very rare that a pda will develop this problem by having both causes.
The first cause is the hardware one. A component called the main voltage convertor is broken. It's a small chip that uses the voltage given by the main battery to convert it's value to various tensions required by some of the components on the pda's main board. If some sub-parts of this chip fails to work, the result will appear as the problem you face, In this case there isn't much to do. Most service centers will replace the whole mainboard because that particular chip is very hard to find as a replacement and difficult to desolder from the board.
The second cause could be a major firmware / ROM memory corruption. These things can happen out from nowhere. In my time working for service centers I've tried to isolate a pattern for this problem but without much succes. However it seems that most of these problem tend to appear durring charging cicles due to power spikes or drops on the main AC voltage supplied to the charger. This is only a supposition, I'm not sure yet on this cause. What to do here? Well this problems are fixable but first of all you must be sure that this is a software problem, not a hardware one. So let's diagnosticate some things.
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If your pda fails to do that, there is nothing more you can do to restore it in a DIY fashion. Probably the bootloader is corrupted or you have a hardware fault. Only a specialised HP service center can help you now. In most cases this will end up with a motherboard replacement.
If your pda does that, then there is a chance to fix it. We will need to probe the bootloader for direct data acces. This is needed for having the ROM memory (and operating system) rewritten. A small program called Mtty will be required to access the bootloader via an usb link.

Please make this tests first and then reply with your results. If anyone of you is in situation #2 there may be a chance.

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Perform the Hard reset

1. Press and hold the Answer/Send, Power, and End Call buttons.
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