I have no experience with this, but I am willing to bet that it's the
ribbon cables that go from the circuit board to the LCD. I've known them
to cause this. First, check that the glue or tape that holds them to the
board didn't undo itself. If not, I have no idea how to replace them,
since they are attached right onto the LCD panel.
>No high voltage on an LCD, it's a low volt device that the presence or
lack
>of voltage causes the cystals to align or scatter, causing balck or
clear.
>There's two types and I don't need to go into the diffs in field effect
and
>the other.
>
>Your outlook on what might be at fault is good. This is one of those
things
>that someone that does this a lot could probably snap their fingers and
have
>the answer. I personally haven't had that much experience with that
machine
>and would have to dig in the schematics and do some hands on to try to
>isolate it.
>
>Doug Yowza wrote:
>
>> OK, hardware gurus, how about some remote diagnostic help: PowerBook
160
>> (my first and only Mac), a bunch of black vertical lines of varying
width
>> on the LCD (different patterns on the two panels that make up the
>> display), but otherwise the display looks good (all the bits in the
right
>> place).
>>
>> Video RAM? LCD controller? Cable problem on the laptop side? Cable
>> problem on the LCD side? Bad LCD? Repair FAQ?
>>
>> I have a volt meter, a logic probe, a fear of high current, but I
enjoy
>> the occassional high voltage zap. What's my next move?
>>
>> -- Doug
>
>
>
>--
>
> --------------------------------------------------------------------
> Russ Blakeman
> RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
> Phone: (502) 756-1749 Data/Fax:(502) 756-6991
> Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
> Website: http://members.tripod.com/~RHBLAKE/
> ICQ UIN #1714857
> AOL Instant Messenger "RHBLAKEMAN"
> * Parts/Service/Upgrades and more for MOST Computers*
> --------------------------------------------------------------------
>
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
As I've said before, I think that getting the battery to work correctly
will solve your sad mac problems. I was able to temporarily recharge the
battery by taking an old power cable, plugging it in, and touching the
cables to the battery terminals. It blew the surge protector a couple of
times, but eventually, I was able to power up the mac. However, this
will eventually wear off and the mac will cease to work again. When this
happened to me, I decided to rebuild the battery, so I took it apart and
left it on my shelf for a few months while the mac ran off two AC
adapters. Then I decided I won't rebuild the battery after all because
it would cost $30 to buy the cells, so I put it back together and
reinserted it into the mac. The two AC adapters were still plugged in.
After several weeks of sitting on this intensive overvoltaged charge
cycle (during which the machine still worked), the battery is as
reliable as it should be. I haven't tested it in fear that it might not
recharge too well again, but the portable runs for 15 minutes at least
w/o wall adapters.
>I've heard of people rebuilding them also, though I have never tried (I
>don't currently own a Portable).
>
>Tom Owad
>
>--
>Sysop of Caesarville Online
>Client software at: <http://home.earthlink.net/~tomowad/>
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
86 computers at the last count
18 video consoles
6 hand-held games
456 game cartidges
lots and lots of software and manuals
Francois
-------------------------------------------------------------
Visit the desperately in need of update
Sanctuary at: http://www.pclink.com/fauradon
>I was just wondering, how many computers do all you have out there???
>
> Michael Sheflin
>
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
>What is it with Apple and clear plastic cases anyways? I think I remember
>clear plastic Apple ]['s at dealers. Did Apple do this for all of their
>models?
>
I have an Apple ][ disk drive in a clear (orange) plastic case in front of
me right now. The plastic itself just wraps around the top and two sides,
with the back and bottom being grey plastic. It is a standard size
isk ][ drive, badged on the back Apple Computer Ltd, Holly Hill Industrial
Estate, Cork, Ireland just like the two other regular Disk ][ drives I have.
But the plastic itself has no markings on it, so it MAY have been put on by
an earlier owner.
Phil Guerney - Brisbane, Australia.
guerney(a)uq.net.au
On Sat, 11 Jul 1998 11:02:36 PDT, "Max Eskin" <maxeskin(a)hotmail.com>
wrote:
>>I have the feeling this is the early version, because mine is the later
>>backlit one, which has no dip switches. The sad mac code could very
>>easily be due to a power problem. It will sadmac if there isn't enough
>>power. Note that running off the portable AC adapter is _not_ enough.
>>You need an additional .5 amps, whereever you get it.
Why is that? Who ever heard of a battery charger for a laptop being
*just* a charger? So, if I hook-up a known-good battery power source of
similar amperage to the internal battery slot, I should be good to go.
Thanks.
Rich Cini/WUGNET <nospam_rcini(a)msn.com>
- ClubWin! Charter Member
- MCP Windows 95/Windows Networking
- Preserver of "classic" computers
<<<< ========== reply separator ========== >>>>>
Hi Doug and all,
At 10:39 PM 7/11/98 -0500, you wrote:
>OK, hardware gurus, how about some remote diagnostic help: PowerBook 160
>(my first and only Mac), a bunch of black vertical lines of varying width
>on the LCD (different patterns on the two panels that make up the
>display), but otherwise the display looks good (all the bits in the right
>place).
>
>Video RAM? LCD controller? Cable problem on the laptop side? Cable
>problem on the LCD side? Bad LCD? Repair FAQ?
>
I have seen vertical lines on LCD's, one or more pixels wide. These were
swapped in a repair shop, so thought there was some ESD damage to the
drivers on the LCD module. The lines were still there when the cables,
controller were switched. The rest of the display still worked OK. It may
have bad contacts to the LCD electrodes, as well, this could give the same
effect, although open contacts may leave the addressed line "blank" not black.
-Dave
Am I nuts or is it possible to use 8 and 16 bit ISA cards in an EISA
slot? This is my first hardware level adventure with an EISA machine and
right now it has EISA controllers and open slots, that I would love to
put certain ISA cards (sound for one) into but while I'm reasonably
sure, I don't want to risk blowing anything up. I've been under the
understanding that EISA was backward compatible with ISA.
--
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
ICQ UIN #1714857
AOL Instant Messenger "RHBLAKEMAN"
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
At 08:34 AM 7/6/98 -0700, you wrote:
>He probably is just referring to the amount of memory it has and is
>clueless enough about the machine that he would call it that. I'm
>positive its just a plain old C64.
I know this was brought up before, but I never heard a clear answer:
What's the difference between a C64 and a C64c, apart from the C128-ish
case design on the C64c?
I heard rumors that it had better sound chips or something, and all the
Commodore dealers (not many left) that I have seen advertise the C64c for
about 20% more than the standard C64.
Russ Blakeman <rhblake(a)bbtel.com> wrote:
> Anyone ever heard of a full length 16 bit ISA AT type card that has
> amonst all the componets a Motorola 68000 (16mhz) processor? It says
> it's made by Microcom, Inc....made in USA
Microcom makes modems. Maybe other datacomm stuff too. What kinds
of connectors are on the back plate?
I have a full-length ISA 8-bit card here with a 68000 on it --
it's a Telebit modem. I'm not sure whether it's a T1000 or a
TrailBlazer Plus though.
-Frank McConnell
Probably not a compatibility thing, more likely a co-processor board
of some sort, like the Definicon.
Kelly
In a message dated 7/11/98 10:20:42 PM Central Daylight Time,
rhblake(a)bbtel.com writes:
> Anyone ever heard of a full length 16 bit ISA AT type card that has
> amonst all the componets a Motorola 68000 (16mhz) processor? It says
> it's made by Microcom, Inc....made in USA
>
> Is this some sort of card to get Apple/Mac compatibility?
>
