one PCB spins the drive the other does not!

[anglomont]

...when testing 2 good PCBs with same firmware on a previously dead
quantum disk(with possiblly different firmware).
Is it possible one has more powerfull chips, and also another
question-does the whacking sound after spin up indicate damaged head
electronics, motor damage or smth else. In general what does indicate
burned head electronics cause I also saw a drive staying quiet after
supplying it with good PCB!? thanks in advance

 

[Rod Speed]

..when testing 2 good PCBs with same firmware on a
previously dead quantum disk (with possiblly different firmware).

Which model exactly ?

Is it possible one has more powerfull chips,
Nope.

and also another question-

How dare you ?

does the whacking sound after spin up indicate
damaged head electronics, motor damage or smth else.

It basically means that the drive is recalibrating when it cant
read the platters properly. That can be caused by damaged
head electronics, a bad connection to the heads, or a full
head crash where the heads have gouged up the media.

It woudnt normally be seen with motor damage.

In general what does indicate burned head electronics

You should normally see the drive recalibrate with bad head electronics.

cause I also saw a drive staying quiet
after supplying it with good PCB!?

Is this the config where the drive didnt even spin up at all ?

 

[Arno Wagner]

..when testing 2 good PCBs with same firmware on a previously dead
quantum disk(with possiblly different firmware).
Is it possible one has more powerfull chips,
Unlikely.

and also another
question-does the whacking sound after spin up indicate damaged head
electronics, motor damage or smth else.

could also be danaged heads, danaged surface, etc..

In general what does indicate
burned head electronics cause I also saw a drive staying quiet after
supplying it with good PCB!? thanks in advance

The signal from the heads not being clean or being missing. You likely
do not have the equipment to measure that.

Arno

 

[anglomont]

Thanks for the input however what do you think of chip overheating
right upon start, probably because interior electronics
http://www.acelab.ru/products/pc-en/articles/ModernHDD/005.html
The 5.1GB quantum el did not spin with one of PCB(fmw a08.1100) at all
though this board worked normally the 2.5GB el drive but another 20gb
lct just spinned and hanged

 

[Rod Speed]

Thanks for the input however what do you think of chip overheating
right upon start, probably because interior electronics
http://www.acelab.ru/products/pc-en/articles/ModernHDD/005.html

The 5.1GB quantum el did not spin with one of PCB(fmw a08.1100)
at all though this board worked normally the 2.5GB el drive

Most likely the firmware decides that its not seeing the correct
hardware so doesnt even attempt to spin up the drive.

Certainly quantum drives of that era do work fine when
the board swap is done between identical drive models.

 

[Arno Wagner]

Thanks for the input however what do you think of chip overheating
right upon start, probably because interior electronics
http://www.acelab.ru/products/pc-en/articles/ModernHDD/005.html

Aha, very interessting. Yes, that could definitely be the case.
They seem tor ecoment to just try the re-soldering procedure
described and see whether that solved the problem. No idea
how difficult that is. I have no real experience with soldering
SMDs.

The 5.1GB quantum el did not spin with one of PCB(fmw a08.1100) at all
though this board worked normally the 2.5GB el drive but another 20gb
lct just spinned and hanged

Sorry, this is outside my area of expertise, i.e. I do not know
what the reasons could be.

Arno