PX5 (800x480)Firmware / MCU update

[TOX87]

Hallo support team,
please help in the following matter:

I updated the unit with the wrong Firmware. Now the PX5 Screen solution has changed from PX5 (800x480) to PX5 (1024x600). How can undo this change of the screen? Please help.
Here are the original data of the unit (before the update):

PUMPKIN Android 8.0 Autoradio Radio mit Navi Europakarten 2019 / DVD Player Unterstützt Bluetooth DAB+ CD Android Auto WiFi 4G USB MicroSD 7 Zoll Bildschirm Universal

CPU: Rockchip PX5
Speicher: 2 GB Ram, 32 GB Flash
Model: PX5-3 (800x480)
Android version: 8.0.0; eng.allen.20180504.123345; SDK26
Kernel-Version: Linux version 4.4.103
Build-Nummer: px5-userdebug 8.0.0 OPR5. 170623.007 eng.allen
20180504.123345 test-keys
MCU-Version: csn2_03202019_103040

I bought the unit from AMAZON. I tried to link it, but the link shows always the new Android 9.0 version, but I have the definitliy the Android 8.0 version: https://www.amazon.de/PUMPKIN-Autoradio ... B07ZF96GL9

I appreciated any help in this matter.
greetings

[Jammy]

Hello
Thanks for your message
Our tech will check and find correct firmware for you.
By the way, have you changed the main baord for your car stereo?
Best Regards,
Jammy