Date: Tue, 25 Jun 2002 06:14:43 +0000
From: "Matthew Hanson" <[EMAIL PROTECTED]>
Subject: Re: [LIB] L70 lid movement/power problem
Hey guys,
Forgive me if I'm slow with my posts. I'm visiting a friend in the country
with a lot going on (mostly sick or gashed up horses at the moment), and
finding a moment to get online is a bit of a task.
The funny thing is that the problem has suddenly vanished. I've been
pushing, pulling and applying torque here and there without the system
shutting down. The L70 has been in the same room in this (need I say) air
conditioned home (in Florida... I think it�s kept at 10 degrees C. all the
time inside).
Although I�ve had no problems recently, I just came back and found the
system had not fully shut down when I left it (or gone into hibernation, I
forget which I chose). I could see that the three green LEDs were lit up
before I raised the lid. But when I did lift the lid, suddenly the AC
adaptor LED started blinking orange for the first time in a while now. It
powered up fine though.
From: "David" <[EMAIL PROTECTED]>
>Sounds to me like you have a short some where, the power blinking orange if
>I'm not mistaken is a warning that the power is to high/low. If I was you
>I'd look for a damage, or pinched wire.<
Yeah... I�m wondering the same thing.
From: "neil barnes" <[EMAIL PROTECTED]>
>Doctor, doctor, it hurts when I do this!
So, don't do it. Next! :) <
Awlreet Doc... but I shur gits derned hungry wit me mouth close fer so
long... :-/
>Hmm - has there been any damage? The ribbon is wrapped a couple of times
>round the hinge pin to provide room for it to move without stretching as
>the display moves. <
I can�t see much of the hinge area without disassembling the lid, can I?
The ribbon has a tiny depression in it on the top side by the MB socket
that�s been there forever. Don�t know if it�s affected the circuit
continuity.
>Orange blinky power light suggests unhappiness in the battery department.
>Are you able to try this with another cell? Perhaps the case flexing as you
>move the lid is causing a problem in the battery unit or in the connector.
>Or, can you try it without the cell at all, just external power?
I�ll try to check out another battery pack and flex the case a bit if I can,
and then report back.
From: Raymond <[EMAIL PROTECTED]>
>It may not be that though ... I notice you've said its separated a bit, are
>you sure the rest of the case isn't slightly warped so part of the metal
>layer on the inside of the case is touching the circuit board? <
One thing I haven�t mentioned in this thread, is the little dent/divot/minor
damage on the case on the rear right (facing screen) right around the SPR
screw socket. I was wondering if the MB may have developed a hairline
crack. But we�re looking for a short, aren�t we? Or could an open circuit
in that corner of the MB cause the system to power down?
But is there metal on the side of the left rear case that could have bent
inward? I�ll have to see if I can see in there.
>Actually, that orange blinky power light indicates any situation where
>there is a power problem, such as the 5V rail dipping due to excess current
>draw. For instance, if you short out a certain data line on the docking
>connector (which for some reason doesn't seem to have a buffer resistor on
>it) whilst its high, the laptop will do a panic shutdown (not even a
>hibernation) and flash that blinky thingy <
I had wondered if the problem may have been with the connector on the EPR
(APR?). So I pulled the system off the EPR (and yeah Raymond, the L70
usually has no complaints with hot disconnections) and wiggled the lid a few
times. Back then that would still power the system down. But no problems
now.
>... so it could be the shorting of ANY line or component that can supply
>more current than the tripoff threshold really. I'd imagine several of the
>lines that go to the LCD inverter would carry more than enough current to
>trip that emergency shutoff if it were shorted to ground.<
Guess I�ll have to ask around here for a magnifier, and look over the ribbon
and MB a bit more. I�m sure I must have looked at that rear left corner
when I had the system open to apply Neil�s fuse wire soldering that got my
LCD working again, but I�ll look again.
M.H.(S.R.)
Date: Sun, 23 Jun 2002 20:14:04 -0400
From: "David" <[EMAIL PROTECTED]>
Subject: Re: [LIB] L70 lid movement/power problem
Sounds to me like you have a short some where, the power blinking orange if
I'm not mistaken is a warning that the power is to high/low. If I was you
I'd look for a damage, or pinched wire.
David
-----------------------
Date: Mon, 24 Jun 2002 07:41:10 +0000
From: "neil barnes" <[EMAIL PROTECTED]>
Subject: Re: [LIB] L70 lid movement/power problem
Date: Sun, 23 Jun 2002 23:42:52 +0000
From: "Matthew Hanson" <[EMAIL PROTECTED]>
Subject: L70 lid movement/power problem
>Recently I�ve had a problem with my L70 shutting down sometimes when I
>adjust the angle if the lid. The system suddenly losses power, and leaves
>me with a orange blinking AC power adaptor LED, the far right of the 4
>LEDs. Pressing the power button at this point boots the system fine, and
>then I can shut it down with the battery and AC adaptor LEDs glowing green
>normally. <
Doctor, doctor, it hurts when I do this!
So, don't do it. Next! :)
>The only connection between the lid and main body of the system I can think
>of is the ribbon cable. So I opened up the top of the system, and
>re-seated the ribbon several times hoping it might clean an oxidized
>connection. But the problem still persists. <
That's the only way conection, though there is the microswitch to detect the
lid closure.
>I don�t know if this is related, but the lid seems to be separating along
>the seam on the bottom right side (facing the screen) by the hinge. <
Hmm - has there been any damage? The ribbon is wrapped a couple of times
round the hinge pin to provide room for it to move without stretching as the
display moves.
Orange blinky power light suggests unhappiness in the battery department.
Are you able to try this with another cell? Perhaps the case flexing as you
move the lid is causing a problem in the battery unit or in the connector.
Or, can you try it without the cell at all, just external power? (Caveat: I
believe the book says don't run without the batteries. I have run for short
periods without apparent harm without them - your mileage may vary.)
Neil
-----------------------
Date: Mon, 24 Jun 2002 17:46:04 +0800
From: Raymond <[EMAIL PROTECTED]>
Subject: Re: [LIB] L70 lid movement/power problem
>That's the only way conection, though there is the microswitch to detect
>the lid closure. <
It may not be that though ... I notice you've said its separated a bit, are
you sure the rest of the case isn't slightly warped so part of the metal
layer on the inside of the case is touching the circuit board?
>> I don't know if this is related, but the lid seems to be
>>separating along the seam on the bottom right side (facing the screen) by
>>the hinge. <<
>Hmm - has there been any damage? The ribbon is wrapped a couple of times
>round the hinge pin to provide room for it to move without stretching as
>the display moves. <
>Orange blinky power light suggests unhappiness in the battery department. <
Actually, that orange blinky power light indicates any situation where there
is a power problem, such as the 5V rail dipping due to excess current draw.
For instance, if you short out a certain data line on the docking connector
(which for some reason doesn't seem to have a buffer resistor on it) whilst
its high, the laptop will do a panic shutdown (not even a hibernation) and
flash that blinky thingy (I did that a few times when I touched the wrong
pin on the docking connector when looking for the PS/2 ports) ... so it
could be the shorting of ANY line or component that can supply more current
than the tripoff threshold really. I'd imagine several of the lines that go
to the LCD inverter would carry more than enough current to trip that
emergency shutoff if it were shorted to ground.
- Raymond
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