My display wont come on on my technics receiver sa ax 540

If the front panel display on your Technics SA-AX6 is not turning on even though you have replaced the display board and verified that the ribbon cable is not broken, there may be an issue with the power supply or the main control board. It's possible that a component on one of these boards has failed, preventing the display from receiving power or a signal. You may need to take the receiver to a professional repair shop for further diagnosis and repair.

It has a power amp module failure
and these cost more to repair than normal
Buy a replacement

You need a cable (from Best Buy or Radio Shack) that is "Mini" jack (Ipod end) and dual RCA on receiver end.

Click here.

This is a shorthand version of protect. See the link below. If you have more questions, please post them here and I'll respond.

Thanks,
Dan

Link: http://www.fixya.com/support/r5390728-protector_means

check for shorts on the speaker terminals

An amplifier should never be turn on without speakers, it will overload internally.
make sure speakers work and try again.

It is unlikely that the display itself is faulty although it can happen. The typical problem is either the backlight is defective or the suply to the unit has a bad connection. If you can solder, try resoldering the pins on the display itself. The pins on the ends are the power and ground. I don't recall whether or not your model has a separate back light bulb or not. That too could be burned. Chack for that too.

Keep us posted,
Dan

Make sure you are using a digital connection, optical or coaxle cables must be connected, setting on receiver must match cable being used

Operationg instructions says it is "F 70". When it appears it says to turn the unit off, disconnect the aC power supply cord, then reconnect and turn theunit on. Consult your dealer if "F-70" remains on the display.