OESF Portables Forum

General Forums => General Discussion => Topic started by: DrWowe on December 25, 2005, 11:19:31 am

Title: Booting Without A Battery
Post by: DrWowe on December 25, 2005, 11:19:31 am
The other day I stumbled across a trick that lets me boot my SL-6000 even with the battery completely removed.  Of course, AC power is required.  Normally, if you take out the battery and hit the power button, the Power LED will just blink and nothing else happens.

But there's another alternate boot procedure.  It's the "D+B+reset" emergency boot that  boots into the special rescue/update partition.  And, I was astonished to find that this boot method works even with no battery.

Anyway, once the emergency boot is finished, you get a login: prompt.  Just type "root", and then, at the command line, type "reboot" and the Zaurus will reboot into the primary ROM.  All without any battery.

Anyway, I'm curious to know if this works on other models too.

Merry Christmas to everyone!

p.s.  The D+P service menu also works on my 6000 without the battery.  (D+M on most other models, I think)
Title: Booting Without A Battery
Post by: adf on December 25, 2005, 01:04:05 pm
very useful, thanks
Title: Booting Without A Battery
Post by: Miami_Bob on December 25, 2005, 09:08:17 pm
Quote
The other day I stumbled across a trick that lets me boot my SL-6000 even with the battery completely removed.  Of course, AC power is required.  Normally, if you take out the battery and hit the power button, the Power LED will just blink and nothing else happens.

But there's another alternate boot procedure.  It's the "D+B+reset" emergency boot that  boots into the special rescue/update partition.  And, I was astonished to find that this boot method works even with no battery.

Anyway, once the emergency boot is finished, you get a login: prompt.  Just type "root", and then, at the command line, type "reboot" and the Zaurus will reboot into the primary ROM.  All without any battery.

Anyway, I'm curious to know if this works on other models too.
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Doc - I finally was able to duplicate this (partially) on my C860s. BUT there is a twisty trick to making it work and a nasty joke at the end.

The first way that I tried failed.

Pull battery & wait briefly.

Plug in AC. No lights (as expected).

Flip baattery switch to ON & charging light starts to blink.

D+B & press the back button --> NADA.

The steps that you must go through to be successful in the first stage are:

Pull battery & wait briefly. Flip battery switch to ON.

Press & hold D+B (or D+M etc) THEN plug in the AC.

NOW the C860 boots to the D+B command line & reboots to Qtopia.

HOWEVER! As soon as the GUI loads, up pops the "Battery Low. Charge the battery" warning window and it WILL NOT GO AWAY or let you do anything else.

So I guess we old C860 users are still SOL if we don't have a charged battery when the lights go out. (G)
Title: Booting Without A Battery
Post by: DrWowe on December 25, 2005, 10:23:12 pm
Quote
HOWEVER! As soon as the GUI loads, up pops the "Battery Low. Charge the battery" warning window and it WILL NOT GO AWAY or let you do anything else.

I should mention I'm running pdaXrom at the moment.  This seems like a Sharp ROM or Qtopia thing.  I'm sure a software fix is possible.  If I flash back to a Qtopia ROM I might look into it.
Title: Booting Without A Battery
Post by: pelrun on September 30, 2006, 12:30:50 am
Having just joined the ranks of the charging-circuit-challenged (damnit damnit damnit) thanks for this tip! Works fine on my 860 with pdaXrom.

Now to buy some fuses...  
Title: Booting Without A Battery
Post by: E.J. on October 06, 2006, 03:36:05 pm
I can get in the Diagnostic Menu with the D+P combination on my SL-5500, but it seems like the D+B combination doesn't work... i wonder if there is an alternate method for the 5500 :S