Toshiba 32LL3A63DG (Vestel 17MB211S-R1) - Brief Toshiba logo then black screen

Hello everyone,

I am trying to repair a Toshiba LCD TV.

Model: Toshiba 32LL3A63DG

Main board: Vestel 17MB211S-R1
Power supply: 17IPS62
Panel/T-CON: HV320FHB-N00

Symptoms:

- The TV powers on normally.
- The Toshiba logo appears for less than one second.
- Immediately afterwards the screen becomes completely black.
- No image is visible with a flashlight.
- The front LED stays green for about 2-3 minutes, then changes to red (standby).
- Pressing Power starts the TV again and the same sequence repeats.

Measurements already made:

- 5V rail = 5.07V
- 3.3V rail = OK
- CPU heatsink becomes warm.
- USB ports work correctly.

USB behaviour:

- Every USB stick is detected.
- The TV automatically creates the DVR folder structure.
- The USB LED flashes continuously while the TV is running.

Firmware:

I tried USB recovery using the package:

MB211_TOS_QUI_Shredder_V333100_SVN_312912

(files:
shredder_usb_update.bin
shredder_usb_update.scr)

The TV behaviour changed slightly after the update attempt, but the fault remains.

Could this be:

- wrong firmware,
- corrupted SPI flash,
- corrupted eMMC,
- or another common failure on the 17MB211S-R1?

If anyone has the exact firmware for this model or has seen this symptom before, I would greatly appreciate your advice.

Thank you very much.