OLED 128x128, mp4 Player - success

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OLED 128x128, mp4 Player - success

Postby Roeoender » Sun Apr 23, 2006 9:35 am

Chapter 0. Introduction
    Model: MP4 Player YaGu 1521CF+
    Display: Unknown 128x128 OLED display
    Board: MP3-906.PCB VER:3.0
    CPU: AMP2085 EA204AB EAV
    Memory: Hynix KOR HY27UG084G2M TPC8 601AA M9SDA913
    Radio: SPT SP3767HN 05LS06
    Battery: 043048SP 3.7V 520mAh FA09


Chapter 1. Making it broke

Action: Killing my mp4 player's firmware by uploading incorrectly modded version of the firmware dump.

Result: Hourglass screen keeps showing, screen is blinking in 1-2 seconds period - clear signal that bootloader in a loop tries to load firmware and restarts after failure.
Player is not detected by computer - neither as disk, nor ADFU device.

Action: Opening the player - really hard as it needed to unglue two plaques on both sides, unscrew some really tiny screws, unglue battery soldered to the memory chip.

Action: Putting mp4 player in the ADFU mode - really easy, using a paper clip on memory unit.

Chaper 2. Trying / research

Action: Uploading some mp4player firmware from s1mp3.org site.

Result: Display went dead - black with fast white blinks, but at least player can be detected as flash disk.

Action: Formatting drive and uploading oryginal player's repaired dump file.

Result: Not as expected - player gets zapped to the state for Adfu mode.

Actions: Uploading various firmwares - for LCD/OLED displays (no full firmware for 128x128 OLED display).

Results: No results - some F/W zap the player, some make it detected as flash disk, none make display any better.

Chapter 3. Solution
After many combinations I came to this single solution that worked.

Action 1: Merge FWIMAGE.FW from oryginal repaired dump with other (top level) files from libik_FM_1GB.bin (3.5.31 FULL firmware), using script generated from libik_FM_1GB.bin.
Upload merged file.

Result: Player gets zapped.

Action 2. Put player into ADFU mode. Upload 958HY-512.fw (from s1mp3 site).

Result: Blue LEDs that are located under keyboard turn on, display stops blinking but no visuals, player detected as flash disk.

Action 3. Format flash disk using RdiskUtility.exe

Action 4. Upload oryginal repaired dump file.

Result: Everything back to normal - display, keyboard, functions etc.

Summary
Seems that having player detected as flash disk isn't enough to repair player by uploading dump file - this resulted in zapping player.
The solution is so complicated as there is no FULL firmware for 128x128 OLED mp4 player with hynix memory chip.
Uploading 958HY-512.fw probably results in a correct merge of flashdisk / display drivers and final dump file upload provides correct resource files.
Anyway it seems safe to upload various F/W types to the mp4 player as I uploaded F/W for LCD displays, with other (non Hynix) memory chip and OLED with wrong dimensions.
Whole operation took me about 10 hours spread on 3 days.

Big thanks to the maintainers of s1mp3.org site and Dead Recovery Guide.

Roeoender.
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Postby ian_hawdon » Mon Apr 24, 2006 4:10 pm

Hi, well done on fixing your player :D

It is always good to hear these success stories as it gives other people hope on fixing theirs 8)
Who is General Error and why is he reading my hard drive? :D

If any of my posts have helped you, or if you're interested, click this link and sign up to help me get a free iPhone: http://apple.real-incentives.com/40461
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Postby Xorisso » Tue May 09, 2006 12:42 pm

can you send your firmwares to me for analysis? i'm using the exact AMP2085 and u seem to be the only one to have it

thanks
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Joined: Sat May 06, 2006 11:37 am

heh

Postby Morph.Grzes » Fri Mar 09, 2007 1:08 pm

It is not so easy as it looks

I have that player too and he don't work after that :/

Somebody help me!!!!!!!!!!!!!!

Polacy mile widziani ponieważ słabo u mnie z angielskim :D
_________________
MPower m11

MP3-906.PCB VER:3.0

AMP2085

Not working :/
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Posts: 5
Joined: Sun Feb 18, 2007 10:54 pm
Location: Poland

Re: heh

Postby Morph.Grzes » Mon Mar 19, 2007 9:34 pm

hehe!!! i fixed mu player to !!:D
_________________
MPower m11

MP3-906.PCB VER:3.0

AMP2085

Not working :/
Morph.Grzes
 
Posts: 5
Joined: Sun Feb 18, 2007 10:54 pm
Location: Poland


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