Audi logo, black screen or constant restarts?
Please describe these symptoms separately. If the RMC stops at the logo, tell us whether it ever reaches the menu. In the case of restarts, it helps to know how long one cycle lasts and whether the unit worked normally beforehand. If the screen stays black, add whether there is sound and whether the buttons respond.
Also tell us whether the problem appeared after a power loss, contact with liquid or a previous repair. The symptoms help us plan the diagnostics; memory or power supply damage is confirmed after checking the unit.
What does RMC repair and testing include?
The scope of work depends on the fault: it may involve the NAND Flash memory, power supply circuits or damaged connections on the board. In water-damaged RMC units, we also check for signs of corrosion and the condition of the electronics. The diagnostic result shows which components need repair.
After repair, we check system start-up and the operation of the functions related to the reported fault. In the case of restarts, we also check stability of operation. If you still notice a problem after installation, let us know — describe how the RMC behaves in the car.
Repair the RMC or buy a used unit?
Before buying a used RMC, it is worth checking whether your own unit can be repaired. You find out the cost of fixing the fault and can compare it with the full replacement cost. You receive the repaired unit with a written warranty.
When replacing the unit, you need to take into account the compatibility of the part number and equipment, as well as the requirements for installation and start-up in the car. A similar panel does not mean the units are interchangeable. Compare the cost of the complete solution, not just the price of a used radio.