Anyhow, it's already broken. You're not going
to make it worse.
While I would agree that's probably true _in this case_, it could be very
bad advice in other cases.
You might have a unit with a trivial fault, but by messing around with it
in the wrong way, you could turn it into a much worse problem.
For example, you might have a floppy drive with just a drive belt
probklem. But if you mess up the head alignment, you will then not only
have to rpelace the belt but also get an alignment disk... Or you might
haev a machine with an easy-to-get IC that's failed. Mess up the PSU or
zap the thing with static, and yoy may have to also replace many much
harder-to-get ICs
-tony