Samsung Blu Ray Disk Recorder has no screen!

Samsung's BluRay player related hacks.
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Sven76225
Posts: 3
Joined: Sat Jan 02, 2021 5:14 pm

Samsung Blu Ray Disk Recorder has no screen!

Post by Sven76225 »

Hello SamyGo members,

Happy New Year to you all!

I have a problem with a Samsung Blu-Ray Disc Player BD-D8509S and I need your help. Maybe someone can help me.

The "old" player / recorder was started yesterday for the first time.

Defect :

The player starts and the display indicator lights up. It lights up all the time

- standby display,
- "HELLO" logo,
- stop symbol
- Play / pause symbol
- Source symbol
- Eject symbol
Dispaly.jpg
There is no on-screen display. The screen is dark via the HDMI connection. Vertical lines can be seen above the RGB output. It looks like the norm isn't right. The hard drive is running, the power supply fan is running, the BluRay drive starts briefly

The supply voltages from S.M.P.S PCB are all measurable and clean. The further voltage generation on the mainboard 1.25 V, 3.3 V, 1.5 V works. I also have the 2.7-5 volts for the HDMI display on the HQ401 and HQ402. But no HDMI output DATA signal.

The device reacts to the remote control and local control. The unit can be turned off and a disc removed. The device shows "Eject" when removing the disc and also exits "clean". However, nothing appears on the TV screen. Also, there is no sound when a disc is inserted.

I tried to read the bootlog. I used a USB To TTL Serial Converter Adapter.
Wandler Bild 3.jpg
UART PIN auf Schaltplan.jpg
UART PIN auf Platine Bild 2.jpg
UART1 RX (R852 10kOhm) to TX of the USB To TTL Serial Converter Adapter
UART1 TX (R859 Pad) to RX of the USB To TTL Serial Converter Adapter
DGND to GND of the USB To TTL Serial Converter Adapter

I get via the PuTTY program and a baud rate of 115200 bps
Putty Ausgabe Bild 4.jpg
Do I have a problem with the firmware? Or with the EEPROM (24LC02B or M24512-RMN6TP) ? How could I flash the firmware in this current state?

Thank you for the help !

LG,
Sven
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Sven76225
Posts: 3
Joined: Sat Jan 02, 2021 5:14 pm

Re: Samsung Blu Ray Disk Recorder has no screen!

Post by Sven76225 »

Supplement :
JTAG.jpg
This BluRay Player device has a Samsung SDP 1004 processor!

I could connect the cables at the resistors to a "JTAG Interface" to the PC.

R1618 = ARM_NTRST
R1612 = ARM_RTCK
R1620 = ARM_TMS
R1614 = ARM_TDO
R1619 = ARM_TDI
R1621 = ARM_TCK
SChnittstelle.jpg

LG,
Sven
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Last edited by Sven76225 on Sat Jan 16, 2021 9:44 am, edited 1 time in total.

Sven76225
Posts: 3
Joined: Sat Jan 02, 2021 5:14 pm

Re: Samsung Blu Ray Disk Recorder has no screen!

Post by Sven76225 »

Hi,

Does anyone have the firmware for the device? I need the BIN file so that I can start a flash attempt. Thank you !

Bye, Sven

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