Question about HP iPAQ H4355 Pocket PC

3 Answers

HP Ipaq H4355 PDA charging problem

Hi, I have an Ipaq H4355 PDA that has a strange problem that is driving me crazy. I bought it new but did not use it much due to extensive travelling. It was working great until it ran out of power for lack of use. When I tried to recharge it, it started the HP logo and the meter apearing on the screen indicated that it was starting but it only kept booting and rebooting. The charging led light never turned on after that and the PDA never charged even after long time of connecting it to the AC power source. I talked to HP who advised me to buy a new battery. I did and the PDA worked fine until the battery discharged. When I tried to recharge it the same thing I described above happened and could not charge the machine. It only kept booting and restarting itself indefinately. I can't use my PDA and nothing worked from soft to hard reset. Any advice? I need help. This thing is driving me nuts. Sam

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  • HP Master
  • 5,327 Answers

This thing is a relic , how can the battery ever be good this old
2004 new, 13 years ago is not new,
$15 battery buy one, and end this.

is your battery 13 years old. if yes, hopeless it is...
google rules on battery life, wiki has it read, it.
no need to guess this. wiki
here is the link....

https://en.wikipedia.org/wiki/Lithium-ion_battery#Variability

cycles over 3000
run hot, ?
lets cells drop below 2v each bad.
the rules for long life are tricky, and same for all batteries, for a century.

Posted on Mar 31, 2017

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  • HP Master
  • 20,706 Answers

HP told you straight up
why ignore them.
buy a battery first.
just like everyone else ever 2 years. or so,... batteries never last
or get so weak they are useless

Posted on Mar 12, 2017

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  • Contributor
  • 23 Answers

Use common sense and frequently charge the battery even when the device is not used.
Draining a battery fully often kills it permanently.

Posted on Mar 11, 2017

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: iPAQ Not Charging from AC Outlet

If you are not using the original chargers it could be the type of charging cable. Not all cables that fit will charge the device correctly.

Posted on Aug 12, 2007

Bogdan
  • 198 Answers

SOURCE: Ipaq 4155 wont turn on, dont charge, dont anything, is totally death

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.
Try to charge the pda. Ignore any lights or beeps or whatever your pda is showing on the screen. As long as the charger is connected the charging process is based on the most primary charging circuits on the pda's motherboard. If the pda is not charging or cannot hold any charge (when you unplug it the screen fades away or it simply doesn't do anything else) maybe that circuit is broken (this is a a sign of serious hardware problems ) or maybe the battery is to old/weak. Batteries don't die out of nowhere, if you remember your pda to work and have some 2-3 hours of standby time it's imposible that now, suddently the battery has drained out so much that even if charged it can't hold out at least 30 min.
So we will assume that you charged the pda for at least 2-3 hours and you see some sign that the battery is working. The next step is crucial. TRY TO PUT THE PDA IN BOOTLOADER MODE. You will achieve this by pressing (and keep them pressed!) the following buttons : power, the far left and right buttons near the control pad (joystick or whatever some people call it) and reset button. You may need another person to help you press these buttons. the order should be the following (first power, then the 2 keys, then reset button for as long as it takes to enter bootloader mode). YOU SHOULD SEE A WHITE SCREEN WITH THE HP LOGO.

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.

Posted on Feb 10, 2008

  • 1019 Answers

SOURCE: can't get soft reset screen on Ipaq travel companion rx5915

Hi,
Try This:-
To perform a factory reset and return your HP iPAQ to factory settings:

1. Press and hold the Quick Launch and Rotate Screen buttons.
2. While holding these buttons, use the stylus to lightly press the Reset button on the HP iPAQ until the device restarts.
3. When the HP iPAQ restarts, release all of the buttons, and then remove the stylus from the Reset button. The HP iPAQ restarts and powers on.
Mike @ compurepair.

Posted on Jul 23, 2008

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Try This:-
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