Hi. I have 2 F700BT units, one in my wife's car and one in my truck. I have had both for over 2 years and have found that they are basically bricks that sometimes malfunction and become fully working navigation units. I have gotten quite good at re-loading the software. In fact, I have a dedicated SD card with the files I need that is ready to go.

 

A couple of weeks ago, the unit in my wife's car started doing the famous AVIC perpetual splash screen reboot. I was slow in getting it fixed and this morning it started doing something I have never seen before. When it starts, it doesn't even go to the splash screen, it goes straight to the reset screen. So I think that's perfect because I won't have to hold all four buttons to get it to the same screen. When I start to enter the service code, the screen will go blank each time I make an input. If I hold the knob in the up position, I get the asterisk at the bottom of the screen until I let go and then the screen goes blank for a couple of seconds. When it comes back to the blue reset screen, the asterisk is gone. So I can never enter the code. I get the same result with the four button reset as well. I've checked the wiring and all the voltages. All is well there.

 

I can't get it to go to test mode either with the SD card installed. I even erased the SD card and reinstalled the files on it. No luck. I have taken the thing apart to see if I can figure out if I can replace the flash drive, but I can't without replacing the navi board for a few hundred bucks. Before I buy a factory radio off eBay and use this AVIC for target practice, I figured I'd ask if anyone here has experienced this and whether they were able to fix it.

 

Any thoughts?

sounds like you are not doing the procedure just right...

 

try this:

 

update (flash OS):

• insert sdcard in unit
  
• to enter uboot mode, flash new OS (winceimg.bin), and format My Flash Disk:
  
• power up while holding reset, eject, menu, & map
  
• release reset, but keep holding eject, menu, & map
  
• at blue screen "please push reset key again":
  
• enter sequence: up, up, down, menu, left, right
  
• choose "0=WINCE Upgrade"
  
• choose "0=WINCE by SD/MMC (Format)"
  
• leave sdcard inserted
  
• hold reset for 5 seconds
  

Thanks for the response.

 

I thought for a second that I may have been doing something incorrectly. So I got in my truck, put the SD card in, powered up while pressing the 4 buttons, got the blue screen and then entered the service code. I then got the menu. However, in the car, I cannot enter the service code. The screen flashed every time I try to enter a character. When it comes back, the previous character is gone.