Won't power up how do I fix it or can it be fixed

try disconecting the Batt to reset the radio

The power relay must be replaced or checked thats where the humming noise come from.

I think you will need to access the Nav System with a professional
scanner or scan tool & then use manufacture trouble charts, to even know what the system is supposed to do, & how to diagnose it

Hopefully a repair shop, if they want the job,otherwise blow out
your wallet at a dealer

If you can,check with your multimeter to see if the two voltage rectifiers are good.If they are OK,you may need to replace the 2 audio amplifiers.This will require proper tools and good experience.

It sound like the main power amp has failed. Look at whatever is on the big heatsink as to the cause. As with any device from "friends" it could be that someone has tried to fix a fault and made a mess. So look carefully at the soldering to any of it's parts.

try to hold your power button and home buttom at same time or 1 min it will rebooth it

Hi Kathy,

What is the printer model ? Try the step below.

While the printer has power, Disconnect the power cable from back of the printer. Wait for 10 seconds and reconnect. This should fix the issue.

If this does not, try changing the wall socket. If you have connected it to Surge protector, Try connecting to Wall outlet directly.

Hope this will fix the issue.

Regards,
Sean

Someone must open it and check voltages on the power supply board as the first step.

Depending on what is found boards may have to be ordered and installed to KNOW which will fix or not fix the set.

Hi Donna,

Please do be frustated.

Your lovely Bose has problem with its mechanism that cause load / unload totally out of order. If you hear some noise while you turn on the bose or when you hit some buttons, it is telling us the motor still work. Now we need to check the broken gears ( or other mechanism linkage).
If you able assemble this Bose, go ahead to find and fix it mehanism ( you may need some parts replacement.

Note : Be carefully with its laser lens while power on ( avoid direct contact to your eyes).

Best luck,

Jay

Could be any number of items related to the seat
power motor circuit

Start by removing & testing the switches

If modules are involved,then it will be beyond
your ability to diagnose ,without a trouble chart

Check any fuses that apply

If a fuse is blown,replacing it won't
likely fix the issue,only blow again