+0

We are returning Audio and Video Processor with changing of processor board.

We are returning Audio and Video Processor with new processor board.

We are returning Audio and Video Processor after the processor board being changed with new one.

+0

None of them are good English. I don't know what you mean.

Maybe:

We are returning the audio and video processor unit that we removed from the circuit board. We replaced this defective unit with a new one.

Comments  
Teachers: We supply a list of EFL job vacancies

Thank you for your kind help.

It is a Yamaha CX-A5100 AV Preamplifier unit. Upon checking, the mother board was found to be defective. We have replaced the defective mother board with new one. Shall I write as follows? Please check and confirm.

We have replaced the defective mother board of preamplifier unit with new one and is returning it.

We are returning the Yamaha CX-A5100 AV Preamplifier unit after defective mother board has been replaced with new one.

Write motherboard as a single word.

anonymousWe are returning the Yamaha CX-A5100 AV Preamplifier unit after defective mother board has been replaced with new one.

We are returning the Yamaha CX-A5100 AV Preamplifier unit having replaced the defective motherboard with a new one.

Students: Are you brave enough to let our tutors analyse your pronunciation?

Thank you