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From: Quaoar on 6 May 2008 19:40
Al Dykes wrote:
> In article <drSdnbaUofsAgoDVnZ2dnUVZ_rWtnZ2d(a)comcast.com>,
> Quaoar <quaoar(a)marcabfleet.net> wrote:
>> Al Dykes wrote:
>>> I have a 5 y/o Compaq NC600c that has spent most of it's like
>>> plugged-in and is used daily.
>>>
>>> It froze in-use and on reboot via the big switch, it would flash some
>>> lights and start the boot sequence but never get to the poing of
>>> spinning up the hard disk. It would then go dark and do it again,
>>> seemingly forever. It does this, plugged in or not.
>>>
>>> Eventually, I tried the laptop w/o the battery and it works fine.
>>>
>>> Is this a dead battery? A dead inverter that is killing the system?
>>>
>>>
>>>
>> I've had two older notebooks with the same problem: dead battery
>> prevents booting. I have come to believe that this is deliberate in
>> order to prevent a dead or failed battery from possible explosive or
>> flammable effects from charging current. I *think* it is a combination
>> of safety circuitry in the battery itself that is interlinked to the
>> BIOS so that no booting is possible if the battery electronics indicate
>> that the battery is in a possible unsafe condition.
>>
>> Both notebooks are Sony from 2002-2003. It is interesting that both
>> notebooks predate the Sony-manufactured battery meltdowns that were a
>> plague in 2005-2006. New, third-party batteries solved the booting
>> problems in both cases.
>
>
> That sounds possible.
>
> As an update for my original post, I kept the batter out for 24 hours
> and then hot-plugged it. OK. Then I rebooted with the battery in and
> it works fine. It runs on battery, at least for the few seconds I've
> tested it.
>
> I have to look in the manual to see what lights I should be seeing.
>
>

If the battery explodes you might be seeing a large variety of lights!

When a discharged battery is installed, with the computer shut down, you
should see a single blinking light in (usually) red or orange. When the
battery is charged, with the computer shut down, that light should be
solid green or off.

Q

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