I have a ~3 year old Harbor Freight 2000/4000 Watt inverter (Item # 60432) that exhipits the following behavior:
Power connection >> No issue
Activation with switch (No load or light load) >> Initial green light then red light and buzzer alarm within 2 seconds
(I accidently knocked it over and the shock caused it to duplicate this power-on behavior) After an impact it repeats the Green > Red/Alarm cycle.
Dissasembly reveals no obvious signs of component failure (visually).
Retired MD here with lots of experience fixing broken people which is less than useless when it comes to repair of an electronic device. Extra Class Ham operator (KG7TXI) but I need the help of a specialist. Well according to my wife, several specialists...
To the best of my knowledge there was no overload or mistreatment.
Yes I have read the posts about this inverter and reviewed the schematics. However I am stupid enough to not know how to test components in situ and which ones to look at.
Test equipment: DMM with diode and capacitor test capability, 500 mhz Osciloscope, small signal generator with square, sine and sawtooth output, so;dering equipment and plenty of component drawers. (Hence my wifes interest in multispecialist consultation .)
Any input would be so appreciated. Thank you, in advance, to the many obvious mavens and true geniuses who fill these pages with your light and knowledge. An irony is that after 35 years studying the wonders, nuiances and complexities of the human condition upon retirement the sum total of my knowledge is not worth the price of a donut and coffee whilst even the most modest technician has knowledge that will be usefule for eternity.
I really don't want to trash this unit, I need it to operate in an off-grid sustem that I am building.
Please be safe, peace upon you and your house.
Jeff KG7TXI

 

Nuances not nuiances. Fortunately, spelling is not a requirement for actual knowledge, or lack of same...

 

Fortunately, spelling is not a requirement for actual knowledge, or lack of same...

Always heard that was why a doctors hand writing was so bad.

 

Have a good look for cracks in the solder joints. The heavy components may have broken loose with the fall.
It may be worth while re soldering them anyway.

 

Have a good look for cracks in the solder joints. The heavy components may have broken loose with the fall.
It may be worth while re soldering them anyway.

Thank you. That's a great thought. I know now they spared every expense possible while making it.
Thank you. Be safe.
Jeff

 

Please let us know how it works out.
73

 

Please let us know how it works out.
73

Will do.
73
Jeff KG7TXI

 

my e16 100 µF 16 V capacitor blew up and was exhibiting the same behavior as you suggest. The other comment of some of the solder joints being knocked loose makes me think that could be it also, check your E16 capacitor for it being loose.