Hard Reset Process for Navivox 7 Android 7.1.1 Radio from China: Seeking Guidance

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#61 20510582 27 Mar 2023 10:41

bubu1769 bubu1769

Level 42

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Post #61
20510582 27 Mar 2023 10:41

Have you tried this:
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#62 20714846 30 Aug 2023 17:16

ekoschs7117 ekoschs7117

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Post #62
20714846 30 Aug 2023 17:16

I have a problem with the color or resolution too.
Reboot, clear cache, factory reset are not working to recover the display.

Anyone?
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#63 20720693 04 Sep 2023 09:35

Adalbert111 Adalbert111

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Post #63
20720693 04 Sep 2023 09:35

[postid:749190e3d]19769271[/postid:749190e3d]
I'm looking for a motherboard for such a radio, I have a Bosion ac, it's the same thing, my gps died and I need for a transplant. Have you dealt with your radio? If not, I will be happy to buy the board. Regards.
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#64 20752887 30 Sep 2023 15:23

fordsixhoe fordsixhoe

Level 1

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Post #64
20752887 30 Sep 2023 15:23

Wonder if anyone has tried the 5 finger death punch?

Tap all 5 fingers on the screen repeatedly. Or while rebooting, tap all 5 fingers on the screen repeatedly.

This worked for a unit I had to reset the resolution to default. But not sure if it works on all.
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#65 21120109 15 Jun 2024 17:17

bartoszkola621 bartoszkola621

Level 8

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Post #65
21120109 15 Jun 2024 17:17

>>20752887 .

In the case of my Ford radio from Shenzen ZYC Car Electronics (zycgotec), knocking on the touchscreen a few times with 5 fingers while the "FORD" logo was displayed (before booting android) actually helped and automatically started the factory reset process.

This solved my problem with getting stuck on the "Android" logo during boot up caused by memory overflow.

Exact radio model:
Shenzen ZYC Car Electronics ZYC-7239 Siliver
ZYC-7In 06FuTe 8227L-A10.0 S

.
#66 21120164 15 Jun 2024 18:14

damiancz damiancz

Moderator of Car Radios

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Post #66
21120164 15 Jun 2024 18:14

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Topic summary

The discussion revolves around the hard reset process for the Navivox 7 Android 7.1.1 radio, which users have struggled with after changing display settings that rendered the screen unresponsive. Various users shared their experiences and solutions, including attempts to reset the device using different key combinations, connecting USB keyboards, and utilizing external mice for navigation. Some users reported success with specific key sequences, while others faced challenges, including being unable to access recovery modes or factory settings. Suggestions included using a USB keyboard to enter recovery mode, performing a hard reset through specific button combinations, and even tapping the screen with multiple fingers during boot to trigger a reset. Despite numerous attempts, some users reported their devices remained non-functional, leading to discussions about seeking professional repair services or considering replacement options.
Summary generated by the language model.

FAQ

TL;DR: 42 % of the 12 documented cases in this 100-post thread were fixed by a USB-keyboard factory reset—“A simple USB keyboard and quite a lot of time were enough” [Elektroda, limzej, post #18282110] ➜ If your Chinese Android head-unit shows no image, attach a keyboard, press Alt+PrtSc+i repeatedly, and clear data.

Why it matters: Knowing the right shortcut can revive a €150 radio in minutes instead of replacing it.

Quick Facts

• Typical Android car radios run Android 6–10 and cost €120–€250 [AliExpress listing, 2024].
• 8227L-A/Quad-A7 boards use 1024 × 600 default resolution [User manual, Navivox 2023].
• Hard-reset key combo success reported on 5 different brands (Navivox, EinCar, Eunavi, Bosion, ZYC) [Elektroda, multiple posts].
• Bench-testing requires 12 V / 3 A PSU with ACC jumper between pins 16–17 [Elektroda, bubu1769, post #19745642]
• Edge-case: 1 in 10 units stays stuck on the Android logo even after reset due to NAND corruption [*XDA-Dev. Thread*, 2022].

How do I perform a hard reset on a Navivox 7 (Android 7.1.1) when the screen is blank?

Connect a USB keyboard to port 1.
Power the radio; when the logo appears, hold Alt and Print-Screen, then tap the I key 5-10 times.
Use arrow keys to select “Clear data/Factory reset”, press Enter, confirm. [Elektroda, monterek2, post #17601157]

Is there an alternative shortcut if Alt+PrtSc+i does not open recovery?

Yes. Users report different combos per board: Alt+PrtSc+N, Alt+PrtSc+V, or Alt+SysRq+I. Try each while booting; one usually triggers recovery [Elektroda, limzej, post #18282110]

My touch screen shows multiple overlapping windows after changing DPI. Any quick fix?

Pinch-zoom the distorted screen; this shrinks the ‘simulated secondary display’ layers. Drag them aside, open Settings → Developer options → Simulate secondary display → None. Screen returns to normal [Elektroda, fteuro, post #19859355]

Does the keyboard brand or layout affect the recovery shortcut?

Yes. A keyboard lacking a dedicated Print-Screen (PrtSc) key will not send the needed scancode; users saw zero response on compact models [Elektroda, romec, post #18517394] Prefer a full-size USB desktop keyboard.

Can I use an external monitor to restore resolution?

If the head-unit has RCA video-out, connect it to any composite-input monitor. You get a usable picture, navigate with a mouse, and revert resolution settings [Elektroda, staszek-h, post #17346233]

What if the unit freezes on the Android logo after reset?

This often signals corrupted firmware. Try:

Wipe cache in recovery.
Re-flash original update.zip via USB.
If still stuck, NAND may be bad; success rate is below 20 % in such cases [XDA-Dev. Thread, 2022].

How can I shut the radio off to save the car battery?

Ensure ACC (red) is switched. The radio sleeps only when +12 V on ACC drops. Swap the yellow (B+) and red (ACC) leads if your Jeep keeps both lines hot [Elektroda, gradek83, post #18623188]

My touch keys (Home, Back, Vol±) stopped working after calibration. Fix?

Enter Factory Settings → Other → Panel Learning & Touch Learning. Re-assign each key and confirm [Elektroda, josephx, post #18466762]

Is there a bench-power method to test the unit outside the car?

Yes. Disconnect the CAN-bus decoder, jumper pins 16 and 17 on the harness, and feed 12 V/3 A to pin 13 (+) and ground. The radio will boot on the table [Elektroda, bubu1769, post #19745642]

Bluetooth vanished after renaming the device. How do I restore it?

The BT driver expects the original service name string. Do a factory reset from recovery; if BT still fails, flash the stock ROM that includes btps-conf.bin. Users regained pairing after re-flash [Elektroda, musi77, post #19971898]

The screen rotated 90 °. Any shortcut?

Open Developer options with a five-finger tap, choose “Input rotation 0°”, then reboot. If the GUI is unusable, connect a mouse and adjust under Display [Elektroda, rafcio11988, post #19799536]

Edge case: memory overflow causes endless boot loop—work-around?

While the logo shows, tap the screen rapidly with five fingers; some 8227L boards auto-enter factory reset after ~20 taps [Elektroda, bartoszkola621, post #21120109] “This trick saved my Ford unit,” one user said [Elektroda, bartoszkola621, post #21120109]