Question about HP iPAQ H4150 Pocket PC
This is a sad story. I dropped my wonderful h4150 down three flights of concrete steps - and it slipped out of its case en route. (Whoever tells you a feather and a hammer should accelerate at the same speed are lying!). Amazingly it still worked - the bottom 1cm of the display was completely clear and the backlight flickerd like Scotty was rotating the frequencies in the engine room - still I managed to get everything backed up and sent it off (for approximately the cost of a second hand one! doh!). It came back with a new display -upon which i could not draw straight lines - it was like there was pulse interference. I sent it back and it returned fixed. Phew. Four weeks later it suddenly hard reset itself. eep! Its been doing it ever since. Basically I can initiate a hard reset and it boots fine. I can reload my backup file. I can use activesinch to load whatever software I want. If I put it in its cradle it sits there happily on or off. If I switch it on and pick it up, its still FINE .....BUT if I either remove it from its cradle whilst swtiched off OR switch it off out of its cradle when I try and switch it on the logo appears, no backlight, and the 'im loading after a hard reset' horizontal line appears. When it reaches the far side, it stops. No backlight. No boot up. Still logo on screen. Wont switch off. But will hard-reset. I tried a new Li-ion. Just the same. Ideas? Im hoping its mechanical - but I have no idea really... I cant see how it only happens on boot up out of the cradle? :( Carl in North Wales GW0TQM
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Posted on Jan 02, 2017
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
u have given a wrong Model number this is not a model number infact a part number pls try to find the correct model number from HP site thru photo identification if u dont find ur model other wise i am providing u detail below to try the hard reset on various series of HP IPAQS kindly be sure that ur ALL DATA WILL BE ERASED pls rate me FIXYA if i fixed ur problem
How to Perform a Hard Reset on an HP iPAQ
Performing a hard reset on an HP iPAQ is relatively easy, but is a dramatic step in the management of your handheld organizer. A hard reset will completely clear the memory of your device and restore it to the state you received it in from the factory. A soft reset, on the other hand, simply closes running programs and restarts your pocket PC.
Difficulty: Moderately Easy
Read the owner’s manual. If you don’t have to do a hard reset, you shouldn’t, and you definitely don’t want to do one by accident. So familiarize yourself with the hard reset protocol offered in the manual.
Make sure you want to clear all personal settings, saved data and personal files from your PDA. If there are files you wish to retain, save them to a removable disk, or send them to your computer’s hard drive to be retrieved at a later date before performing a hard reset.
For the HP iPAQ h1900 series, hold down the power button while you use your stylus to hold down the reset button (on the left side of the iPAQ). Hold these buttons for a few seconds until the screen fades to black.
For the HP iPAQ h2000 Series, press down on the far left and right buttons (calendar and iTask, respectively). While you do this, press and hold the reset button on the back of the iPAQ until the screen fades.
For the HP iPAQ h5000 Series and H3800 Series, the procedure is the same as the h2000 Series with the only difference being on some models the Today button is used instead of the iTask button.
For the hw6500 Mobile Messenger Series and hx2000 Series the procedure for the hard reset is precisely the same as for the devices in step 4.
For the rx3115 and rx3715 models, hold down the Mobile Media button (on the far left) and the iTask button. Then press down the reset button with the styles for a few seconds until the screen goes dark.
For the rz1710 and rz1715, follow the same procedure as the devices in step 7, with the difference of pressing the Today button (on the far right) instead of the iTask button.
To turn on your HP iPAQ after your hard reset, either press the reset button again, or plug it into an AC power source.
Tips & Warnings
* If you’re iPAQ is simply slowing down or having problems, try a soft reset (reboot) before resorting to a hard reset.
* Read your iPAQ’s instruction manual to familiarize yourself with how to do a hard reset, and the effects of performing one.
* Do not perform a hard reset unless you are okay with or intend to erase all non-factory installed data and settings from your HP iPAQ.
Posted on Mar 17, 2009
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1.) Make sure battery is charged
2.) Locate the rom you want to use
3.) Remove machine fro cradle
4.) Press the POWER + iTASK + CONTACTS + RESET buttons at the same time so as to enter the FLASH Mode
5.) Make sure your USB connection to the Cradle is hooked-up.
6.) Place your PDA in the USB Cradle.
7.) Stop the MS ActiveSync session on your HOST PC: CTRL-ALT-DELETE > TASK MANAGER > PROCESSES.
8.) Highlight WESCOMM.EXE and select "End Process" button.
9.) Run the file you downloaded from your Vendor in step 3.
10.) The PDA should now begin Flashing the iPAQ's ROM BIOS.
Posted on Jan 22, 2010
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