Fault onroadpro 2500w inverter.The 110vac is going on100% but desapear imediately and hear only thefault noise

Did you ever find an answer to fix your problem?
I have the same type of problem, and feel bad as I am an electronics tech with years of experience. I know that it must be a bad IC, transistor, capacitor, diode, resistor, etc. However, with all the components in the 2500, it is almost impossible to trace it out without a "Service Manual" or a schematic diagram. To blindly go in to just start 'tracing' a circuit and not knowing the wiring is not good to do. It is also almost an impossible task to simply start removing parts to test on the bench, and then reinstall. Even IF all test good, there can be a fault on the board itself. For an answer you can do as I am doing, and that is to call the company that is listed as the company involved with customer service.

Customer support/contact, Truck and Automotive Accessories 1875 Zeager Road Elizabethtown, PA 17022 Sales & Customer Support Toll Free (866) 622-7979 [email protected]/roadpro

If you would need to hire a tech to find the problem he would have to be a good friend to volunteer his work or the cost would be as high as buying a pure sine wave inverter.

Take care, Dave. (DJnRF at yahoo)