I consider everything repairable here except for two items: Microwave oven and the Samsung 32 LCD. The Microwave for obvious reasons...HV and possible RF leakage. Bad ju-ju that I won't mess with. The Samsung. If it craps out and the fault is obviously in the PSU I will attempt repair. Anything beyond that forget it. The additional boards have no service data, can't be repaired, and are expensive to replace even if available. Into the trash it goes.
Oh...and the Acer Laptop.....I would give it a shot. But might have to add it to the list too.
RF is a pussycat--------SMPS, on the other hand, have changed beyond recognition from the ones I used to be a "dab hand" at fixing.
Really, there isn't much to go wrong with a magnetron.
Are the filaments still OK (not O/C)?
is the filament supply present?
Is the HT present?
Everything else goes back to that bloody switchmode supply, or some horrific controller board.
I had a "National" microwave oven years ago (yeah, just before they started calling everything "Panasonic").
After a year or so, it refused duty.
They weren't so "dirt cheap" back then, so with misgivings, I opened it up.
The fault was immediately obvious------- a poor crimp on the connector which the Magnetron filament pin plugged into.
I just cleaned up the connector, cut back the wire, which had got a bit cooked, & this time, soldered the connector.
I was a bit worried about soldering it, because the filament pins may get a bit hot in service, causing deterioration of the joint, & causing my repair to be short lived.
No, as 15 years later, the thing was still going.
I convinced myself it was a big, unwieldy old thing, maybe the magnetron heater had lost emission, etc, so retired it.
I haven't had any microwave ovens that lasted 15 years any time since.
Of course, the old National had no SMPS to go wrong---------the tube anode was fed raw 2 kv ac from the Mains transformer secondary!