WallStreet 12" death, maybe a overvoltage ?

The fan running non-stop tells you ONLY that:

1) power has been interrupted AND
2) The internal backup battery was not strong enough to maintain the internal parameters to avoid corruption, so all the parameters may be wrong.

There may be nothing permanently wrong.

If sleep LED is continually on, backup battery power has been interrupted. Restart computer by holding down Shift-FN-Control and Power-on key. Wait 5 seconds and press Power-on key. If computer doesn’t restart, repeat 3–4 times.

leave it connected to the charger. It can take 48 hours on the charger to get a dead backup battery back in operating range.

It is connected in hopes of recharging the small internal backup battery. Fan/ventilator on or off and LED on or off make no difference.

Usually, but not always, Reset turns the fan and LED off.

toniomac,

This was a response from another user who had the same problem and asked for help from PB Parts:

"The light and fan staying on after a PM reset indicate that the PMU is asking to be reprogrammed, but is getting no response from the processor. In their experience, my symptoms indicate a bad processor about 70% of the time, a bad logic board about 20% of the time, and all other causes, including an iffy PMU, the remaining 10% of the time."

The above user had success replacing his microprocessor card. You might consider buying another Wallstreet for parts (it might even have a dead display) and then start swapping parts. The other approach is to spend $60(?) for a diagnosis, then replace the part yourself.

toniomac,

A bad keyboard can prevent the Wallstreet from starting. If you wish, carefully disconnect the keyboard ribbon cable from the logic board, then try starting. I doubt this is your problem, but certainly worth a try.

Here is a disassembly guide:
http://www.ifixit.com/Guide/3.0.0.html

toniomac,

You don't need a keyboard to start the Wallstreet. Just disconnect the Wallsteet's keyboard ribbon cable, then press the power button. If it starts, I believe you have to remove all power to turn it off; I don't think pressing/holding the power button will shut down the Wallstreet like newer powerbooks.

toniomac,

Besides the microprocessor card, there are three other possible components. Below are the parts and examples of each. Please don't put a lot of money in this 12" Wallstreet; it doesn't have much value and troubleshooting a failure by replacing parts can be expensive. (I am guessing it is a 12.1" passive-matrix, dual-scan display with the 233MHz/0k CPU.)

- power supply card
http://www.ifixit.com/cart/customer/product.php?productid=28&cat=&page=1


- PMU card (Power & Charge Card)
http://www.ifixit.com/cart/customer/product.php?productid=29&cat=&page=1

- I/O logic board
http://www.ifixit.com/cart/customer/product.php?productid=169&cat=&page=1