Question about HP iPAQ H4150 Pocket PC

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4150 battery charging

I cannot charge the battery in the charger. It appears that the computer recongnizes the pda but will not charge-old or new battery thanks

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Re: 4150 battery charging

When trying to charge the battery, do you get any Amber LED indicator on your iPAQ? It should be flashing when charging and solid when fully charged.

Posted on Sep 08, 2005

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I want to charge my battery with a usb cord from the computer but my phone had been discharged for two weeks now and i need help


Then it means you have too boost the battery before it will be able to get charged. First try to insert the battery into another PDA and try to charge it there, it will take a little while to get it to charge, since it has been dead for 2 weeks now. After a little while the battery will begin to charge, or you can get en external/universal charger to charge your battery before inserting it back into your PDA and charge with a computer. That should do the job for you.
Hope this information helped.

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I will be writing off the PDA as it is now over three years old and updating to more recent technology. I have not yet made my repalcement choice.

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Sir,
It is your PDA battary problem you are suggested to buy new one as by getting charged it cells get weak by the passage of time.

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Acer N30 PDA charging problem


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Ipaq H3835 PDA - won't hold charge??


If you purchase a new battery, they usually come with directions and special tools to change the battery. I had the same issue with 2 of mine when I got them at a used electronics store. IF it is the battery that is not working, then replacing it is easy, and you can get a replacement at your local Battery-Plus store.

In my case, one was fixed by a new battery, the other was not, and I actually had to press pretty hard in the cradle to get the second one to work. It never worked out of the cradle, so I gave that one to a neighbor kid to tear apart and see if he could get it working. (I got them for $15, so no big loss.)

Apr 21, 2008 | HP iPAQ H3835 Pocket PC

1 Answer

Battery won't charge after being replaced


The charger might be bad. Or then the pdas connector is bad, or the motherboard is damaged.

to find out is your charger working you could use a tester to test it or another pda.

If you could get some power into the pda you could use the bootloader to test the device. Its been years since I had my 3850.

Il have to find instructions on how to get to the bootloader but test the other things first.

Drop a comment.

Mar 11, 2008 | HP iPAQ H3835 Pocket PC

1 Answer

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.

Jan 06, 2008 | HP iPAQ H4150 Pocket PC

3 Answers

PDA would not turn on...


try to charge it for longer time, then try to turn it on, i'm not sure that its gonna work.

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Battery wont charge


did you think about checking the charger?

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