shaun Posted August 19, 2010 Report Share Posted August 19, 2010 I just tried to downgrade a replacement AVIC-90DVD (I had one that stopped powering on) to the CNDV-40R (WEST) disc. I assume I need to downgrade because it just shows a white screen that says "Insert a valid disc". Following the above instructions worked, I made it to the "test mode" menu, "Program forced write" is now #8 on the second screen of menu items... Boot = 2.01 OS = 3.02 GPS = 2.30 When I select "System Program", it shows me a list of all the languages, but everyone has "NG" at the end, for example: "US English [ NG ]" If I select "US English", it wants me to push "OK + POSITION" to program or "BACK" to cancel. Pushing BACK works just fine, but I've tried "OK" by itself and in unison with every other button on the remote without luck. What does it mean by "OK + POSITION"? Also, is the "NG" bad? Thanks! Quote Link to post Share on other sites
shaun Posted August 28, 2010 Report Share Posted August 28, 2010 Ok, I got rid of the "NG" by swapping the dvd drive out from my original (bad) unit... turns out the new unit had a bad dvd drive. Now it says "US English [ 3.03 ]". Still can't figure out "OK+POSITION"... Anyone? Quote Link to post Share on other sites
shaun Posted March 13, 2011 Report Share Posted March 13, 2011 Ok, I got rid of the "NG" by swapping the dvd drive out from my original (bad) unit... turns out the new unit had a bad dvd drive. Now it says "US English [ 3.03 ]". Still can't figure out "OK+POSITION"... Anyone? I've tried hundreds of button combinations, still can't figure out "OK+POSITION". Someone at Pioneer is laughing at me right now. I also tried using my CNDV-20 disc (v2.5), but that didn't help either. Quote Link to post Share on other sites
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