Program button no response

Question edited for clarity.

It sounds like the compressor is struggling / overheating / failing. When was the last time your stripped the back out and removed all the fluff and debris? It overworks the compressor and gets red hot when the condenser coils get blocked. The struggling compressor causes the humming. Turn it off, keep the doors closed and vacuum it all out. Clean underneath and you might as well clean the floor and walls around it as the plan is to leave it disconnected for 1 to 2 hours to cool down and settle the refrigerant gas/liquid. Some other ideas below.

The evaporator fan motor circulates air over the coils to help keep things cool inside your fridge. If this motor starts to go bad, it will make a buzzing sound as it struggles to circulate air. You'll need to replace the evaporator fan motor to fix this problem.
Aug 22, 2022

Frigidaire Refrigerator Runs Loud? This May Be Why...

I would get berryman and sea foam and do an induction cleaning on the intake. It sounds like running low quality fuel may have caused the intake manifold to get gummed up causing low flow through the egr valve.

You can try a laser cleaning kit to see if that will help, generally when the laser gets to that point it is time to replace the laser pickup assembly or just replace the whole unit due to cost over runs in repair.

One of the power supply voltages is bad... either a short or the regulator is blown. Follow my instructions for a previous poster:

http://www.fixya.com/support/t10013559-mackie_1604_vlz

I suspect the power supply has an issue. Most likely bad filter capacitors. This could cause "motorboating" where power is drawn and supply voltage collapses and then recovers repeatedly.

Time for the repair shop. The parts cost should be nominal... labor... well...

Sounds like a dirty lens on the reader.... Not familiar with the mac's drive, does the laser assembly come out with a drawer for the cd?... or is it a slot load?. if its a drawer, clean the lens, if it's a slot, try a cleaning disk. failing this, you could have a faulty reader... Ho-Hum...

i experienced that problem before.one cause is the cd itself.there cd's that are too thick so the motor has hard time rotating that makes vibrating sound.the other ,don't put something over your unit.the cover is touching the holder of the cd and makes a sound.just do the necessary things to be done like don't put something on top your unit.if not, then a manual analysis of the tech is the last option.

Brent
The magnatron in your oven has gone out and will need replaced!( This is the device that heats up your food) If everything is working and your food is not getting hot 99.9 percent of the time its the Magnatron or its fuse! The loud humming is also a big clue the MAGNATRON has gone bad!
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Bad earth / failed capacitor on the PSU board. I sell replacements via ebay or can email a service manual for you to get fixed locally. Fluffcat1

did you alredy clean the laser lens?