GK MB150 resurrection?

[rubberbass]

Hi all, my first post here.

My trusty MB150E (mark I) has finally lost it. Almost constant crackles and loud pops when I play.
I had her checked out by the experts who distribute GK gear here in Australia. After two weeks they couldn't find the source of the problem, and sheepishly handed her back, unimproved.

Now she's a door stop.
Can't sell her like this and seems such a shame to throw her out
However, I was wondering if there is a way to resurrect her.

There is an MB150 Head only, right? If I purchased one of these, would it be possible to swap out the old head components of the combo and insert the new?

Cheers, rubberbass
Edit/Delete Message

[Jazz P Bass]

The first thing to do is narrow it down to the preamp or power amp.
A general health check of the power supply is also called for.
Experts, huh?
"Expert, texbert, joking smoker, don't you think the joker laughs at me" John Lennon.