I had this on mine and it was the laser on the unit that couldnot read dvd disc so I just bought a new unit
You have to use good quality DVD, preferably from Verbatim, and DVD+R for firmware and DVD+R DL for maps. Then you burn them at the slowest possible speed. You can also clean the lenses of your DVD burner.
Quote from: Shoduchi on March 10, 2017, 07:47:00 pmYou have to use good quality DVD, preferably from Verbatim, and DVD+R for firmware and DVD+R DL for maps. Then you burn them at the slowest possible speed. You can also clean the lenses of your DVD burner.You also mentioned josi firmware 5238 firmware which should work on the Japanese 510, there is no way i can burn josi firmware in the above quality as i dont have a clue how to do this. I need to buy the josi firmware and uk maps in the above quality but dont have a clue where from??