Question about HP iPAQ HX4700 Pocket PC
Unit worked well this morning - docked all weekend. Colleague couldn't power his 4700 up. Offering help, I took battery from mine and put it into his. Didn't work. Worse, I put his battery into mine. Didn't work - now they're both dead. Both batteries have full charge. Soft resets (Stylus in the end) didn't work, Hard resets - (hold two keys + stylus in the end) didn't work. Neither unit powered up when docked (tried three docking stations). Neither unit powered up when docking station bypassed and plugged direct to A/C for charging. No charging lights, nothing. Dead... Lastly, I tried removing a media card and re-inserting it (which usually forces powering on) - nothing. Any ideas?
How to correct iPAQ 5450, 5455, 5550, 5555 battery charging problems / dead unit syndrome.
The iPAQ 54xx or 55xx will not power on if the batteries charge is lower than 3.2 Volts, if your battery charge falls below the 3.2 volts level your unit will not turn on, you need to plug the iPAQ into a cradle or AC charge adaptor. Note the charging light on the iPAQ will not flash at all (normally flashes orange) until the battery charge has reached a minimum charge level of 3.2 volts. You then need to perform a normal reset, then the unit should switch on normally.
HP Procedure is as follows:
To charge and reset the iPAQ Pocket PC h5400:
i) Connect the iPAQ Pocket PC h5400 to an A/C power supply.
ii) Charge the battery to the minimum level of 3.2 Volts. This will take 5 to 30 minutes depending on the current charge level.
iii) Perform a normal reset.
iv) Power on the iPAQ Pocket PC h5400
It is recommended that you keep the iPAQ Pocket PC connected to the Universal Cradle or Cable when it is not in use.
Posted on Apr 19, 2008
The AC charging lead adaptor looks identical to the adaptors used for other devices. The internal wiring in these adaptors is not consistent. I know from bitter experience that using an XDA2 adaptor on a hx4700 will burn out the printed circuits on the motherboard.
Posted on Oct 26, 2008
When you insert the battery inthe hx4700, the battery lock must be in the locked position.
This lock closes a microswitch inside the PDA. If the microswitch is not closed, then the PDA will not do anything, including power-up, charge the battery etc.
Unfortunately, the microswitch is very tiny and (in my opinion) quite feeble - definitely not up to the job, especially if you remove and replace your battery frequently (many people carry spare batteries).
On my hx4700, this switch failed. At the time, I just assumed the whole thing was dead and bought another off ebay. The same thing happened with the second one. I guess the switch can be replaced (at some ridiculous price).
I read somewhere about somebody who permanently shorted out the connection by soldering a wire across the switch terminals and it had no ill effects. I wouldn't necessarily recommend it though.
Posted on Sep 23, 2008
Try to take the battery out for about 10 seconds and insert back in. Good luck!
Posted on Dec 30, 2007
Make sure that the battery lock is pushed back to the correct position. i.e towards the reset button. If it is not locked the machine will not power up.
Posted on Oct 29, 2007
Make sure the 2 black tabs on the battery cover are in the "lock" position.
Posted on Jan 07, 2008
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Posted on Jan 02, 2017
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