Power failure IPAQ4350

It is, most probably, behaving like that because some application is taking too much processing power, hence, consuming battery, which, by its turn, heats up. Besides, active data connections are known to drain the battery very fast. Anyway, Google for Dotfred's TaskMgr.exe, copy it to your device and run it You'll see which application is taking more power than others.
Just my 2 cents... Carlos

try going in to power settings while in the cradle, tap backlight and set it so it doesnt go off. Worked for me!

Slider switches ok and pointing at the right place in the bottom?

1. Main battery possibly needs replacing.

2. Replace backup battery..

http://www.youtube.com/watch?v=cYwc_-ISnsA

Ufortunately, the battery is likely the culprit.
You can try removing the battery overnight, then leave on charger for at least 12 hours.

These batteries generally require replacement every 1-3 years. They deteriorate quite rapidly if left unused/uncharged for extended periods of time (like a year!)

You may need to purchase a new internal battery

Try this - don't give up Leave it charging, even if it takes three days. I sold one a few years ago on ebay and the buyer was insistent it wouldn't charge. Eventually it did start charging and there were no more problems.

MAY I KNOW IF THE HOT AREA WAS ON THE BATTERY SIDE OR IT WAS THE WHOLE DEVICE WAS ACTUALLY HOT.

Hello and sorry for the delay.

the h1945 series is a very intresting pda. I have seen all sorts of problems relating this one. There are some things you may want to try. Based on that knoledge I may be able to find what's rong with your unit.
First, check if the back cover fits tight on the back of the unit. It's important because on some ipaq models, there is a small micro-contact that doesn't allow the unit to power on if the back cover isn't attached. I'm not sure if the 1945 has one, it's been 2 years since i've last phisically repaired one of these, but you may look for one yourself. It's a small contact near one side of the back opening, check to see if it can be pressed. If you don't have anything like this just ignore this tip.
Second, leave the pda connected to the charger for about 6 hours. Even if it doesn't do anything. Then try to start the bootloader by pressing the 2 outer keys near the D pad (simillar to the hard reset procedure) then, while keeping those pressed, press the power button and in the same time press the soft reset button with your stylus. You must do this with your charger connected to the pda. It may be difficult to achieve in the first try. Just try to do this a few times and if the pda doesn't respond even now, please post back. Furthermore, if you need more info about these 2 tips please reply.

I battery dead ? In some case, ipaq battery dead will not start. ================

Hi, Based on your post/description, your iPaq 2210 will not power on. It is possible that your battery is deactivated. To reactivate, plug it to the AC power supply/adaptor, press reset at the back of the unit. Assuming no other problem, the unit will initialize back to default factory settings. It's very likely that all your previous/personal settings, files and applications will be also gone. Good luck and pls post back how things turn up. Kind regards.