In comp.sys.ibm.pc.hardware.misc XYLOPHONE said:
Thanks for all your replies.
The main issue here is to be able to use the laptop. I don't care
about data on the drive.
Ok, makes things a bit easier.
To give more clues, here is in more details what I notice.
- The drive works when I put it back in the laptop.
Good. That means these drives do not get killed by a turned
connector.
- Booting the laptop with a different drive, known to boot on another
laptop, gives a blank screen with cursor in top left corner, and
freezes, probably because wrong BIOS setting since different type/
brand, but BIOS is not accessible.
That would only happen with a very old BIOS. Today they are typically
set to auto-detect.
- Booting from floppy or CD fails. BIOS probably bypasses those boots,
and is not accessible.
- Booting with the original drive brings XP, but asks for password in
all cases (safe mode, command line as well).
Strange. Are you sure you cannot access the BIOS? Maybe some
non-standard key combination that is not displayed on bootup?
As you say XP boots, which means the BIOS itself is not damaged.
So I can't even just get to a DOS prompt, because I once found on
Internet a way to clear BIOS password using DEBUG commands, in the
case just a floppy boot would allow to attempt. I did not consider
opening the laptop and trying to find the CMOS battery or jumper,
because I don't know exactly where it is and don't want to damage
anything by accident.
Hmm. It is possible you will have to go that way in the end. But
not yet, I think.
I'm also puzzled about the adaptor, why no power is felt. I know
laptop drives are quiet, but I really felt nothing, not even a tiny
vibration. The adaptor has a 44-hole female end that matches the 44
pins on the laptop drive. However there are 4 more pins on the laptop
drive that are not covered by the adaptor, which are separated from
the rest by a space.
These are for factory testing. Ignore them.
Since IDE is normally 40 pins, I assume the power
is already included in the 44-pins covered, and the 4 extra pins (not
covered by adaptor) are for jumpers.
Yes.
(Anyways, if this had been power,
how would I connect since it's not covered by adaptor?).
;-)
The other end
of the adaptor gives a standard 40-pin male IDE which is into the IDE
cable to controller, and there is are extra 2 wires for power that
lead to a separate white plastic connector that connects to the
standard large 4-hole power connector.
Fairly standard.
However only 2 of these are
wired: the red and the black, as opposed to other desktop devices
which uses 4 wires for power. I assume it's enough to power the laptop
drive.
It is not about "enough" power. It is just that at some time
it was decided to have 2.5" drives only use 5V, as that makes
laptop design easier. You pay a small speed penalty for that.
And it makes everything a bit more expensive.
Again, thanks for any advice on the laptop issue, and the adaptor
mystery.
Can you check that the power conector is actually working?
One way is to not plug the adapter into the ribbon cable, just
connect the power. The laptop drive should auto-spin then.
On the data connection, you can plug this in frongly in two
places:
- Adapter-to-drive
- Adapter-to-ribbon cable.
The second option would give power to the drive correctly but
would ground several signal lines, which could prevent the drive
from spinning. Doing it wrong on both sides prevents the drive
from getting power, so also no spin.
Incidentially, for some cables (no "nose" on the connector)
you can in addition plug it in in the wrong orientation on the
mainboard side with much the same effect as the second option.
Here is the way to figure out orientation (I know, this
is horribly faultu design...):
1. Find pin 1 on the ribbon cable. It is on the side that
has a marked wire
If that fails, look for the side of the connector that
has a nose in the middle. Pin 1 is left if the nose is up
and the cable side is away from you. If there is no
nose, look carefully, you can often see markings on the
connector where it was supposed to be. The other side will
be smooth.
2. Find pin 1 on your HDD. On most HDDs it is marked.
However the connector is standardized. Place the disk
PCB down, top up with the connector towards you.
Pin 1 is on the right side.
3. The adapter. This is easiest, pin 1 is on the opposite end
from the power connection.
If all is connected right, remove the ribbon cable from the
adapter and just connect power (allways do this with no power
to the computer!) and see whether the disk spins on power up.
If it does, try again with ribbon cable. If not, you power
connector is likely broken somehow.
There will be more steps after this because of the BIOS
trouble, but this is first.
Arno