robster Posted April 14, 2023 Report Share Posted April 14, 2023 Have a DMH-1770NEX I bought a year and a half ago. About 3 weeks ago, screen went completely black and I thought the unit was dead. Then randomly the splash screen came on with vertical lines through it. Now the splash screen comes up that says NEX on it, but it never gets farther than that! Backup camera works. I have heard the AVIC line has a series of crappy sd cards, does this model have this as well? Anyone have any ideas on how to fix? Quote Link to post Share on other sites
asd255 Posted April 14, 2023 Report Share Posted April 14, 2023 HI stripes looked like this? Quote Link to post Share on other sites
robster Posted April 15, 2023 Author Report Share Posted April 15, 2023 YES!! That problem went away and now it just says NEX on the screen and never gets past it. Quote Link to post Share on other sites
asd255 Posted April 15, 2023 Report Share Posted April 15, 2023 this is a manufacturing defect. bad soldering flash ROM (U27) repair will require a soldering station and force firmware rewrite I can provide detailed information on how to fix the defect. but you will need to be able to use the soldering station Quote Link to post Share on other sites
robster Posted April 16, 2023 Author Report Share Posted April 16, 2023 thanks. I can do that. Can you provide? Thanks Quote Link to post Share on other sites
asd255 Posted April 17, 2023 Report Share Posted April 17, 2023 This problem is for models DMH-160BT,DMH-1700NEX,DMH-1770NEX,DMH-A4450BT,DMH-A4480BT,SPH-DA160DAB I have a service bulletin for SPH-DA160DAB the repair process consists of 2 parts 1. soldering 2. Update FW I have files only for SPH-DA160 NO WARRANTY THAT THE FIRMWARE FILES WILL WORK WITH DMH-1700NEX,DMH-1770NEX Bulletin Nr. 1918 Quote Link to post Share on other sites
sdamian Posted April 9 Report Share Posted April 9 Hello, I do not have the tool you have that switches the illumination and power supply on or off. But will that be okay if I connect the wires to a power supply generator and use a breadboard to give certain ground and voltages to the specific wires? I am thinking of creating a simple switch-button circuit for the illumination On 4/16/2023 at 11:18 PM, asd255 said: This problem is for models DMH-160BT,DMH-1700NEX,DMH-1770NEX,DMH-A4450BT,DMH-A4480BT,SPH-DA160DAB I have a service bulletin for SPH-DA160DAB the repair process consists of 2 parts 1. soldering 2. Update FW I have files only for SPH-DA160 NO WARRANTY THAT THE FIRMWARE FILES WILL WORK WITH DMH-1700NEX,DMH-1770NEX Bulletin Nr. 1918 Quote Link to post Share on other sites
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