FAQ
TL;DR: If your TV boot‑loops on the splash screen, 1 reliable fix is reprogramming the SPI flash; "It is best to program a new memory in an external programmer." [Elektroda, janomo, post #19610270]
Why it matters: This helps owners and bench techs quickly resolve splash‑screen boot loops without random part swaps.
Quick Facts
- Set details reported: BS49E148BFJ0U0K10M, main board T.MS3463S.771, panel LC490DUY‑SHA1, PSU MIP550D‑240V350. [Elektroda, mechsteve, post #19569745]
- Symptom: splash screen shows, then standby and reboot in ~40 seconds; remote signals seen but TV stays unresponsive. [Elektroda, mechsteve, post #19575304]
- USB update trial: FAT32 stick with .bin, LED flashed ~4 minutes, no change after power cycle. [Elektroda, mechsteve, post #19577062]
- Likely fault after failed updates: bad SPI flash or main SoC, not the PSU/backlight. [Elektroda, querij, post #19579776]
- Used replacement main board cost cited around £70, impacting repair economics. [Elektroda, mechsteve, post #19593008]
How do I fix a Blaupunkt that shows only the splash screen and reboots?
Reprogram the TV’s SPI flash externally with the correct software. USB updates can fail when the flash is weak. "It is best to program a new memory in an external programmer." This targets corrupted storage on T.MS3463S‑series boards and restores boot. [Elektroda, janomo, post #19610270]
How do I try a USB firmware update on the T.MS3463S.771 board?
Follow the same method used in the thread:
- Format a USB stick FAT32 and copy the .bin to root.
- Unplug TV, insert USB, power on; wait while the stick’s LED flashes.
- When flashing stops (~minutes), power off, remove USB, restart.
If nothing changes, proceed to hardware programming. [Elektroda, mechsteve, post #19577062]
My USB stick flashed ~4 minutes, but the TV still loops. Is that normal?
Yes. A USB update can appear to run for about four minutes and finish, yet the TV remains in a splash‑screen loop. That outcome indicates the bootloader read the file, but the underlying fault persisted. Move on to reading and reprogramming the SPI flash externally. [Elektroda, mechsteve, post #19577062]
Where can I request official firmware for Blaupunkt/UMC TVs?
Use the UMC‑UK feedback form to request software. Describe the defect clearly and ask for the correct firmware. This route supplied a file to the original poster. Provide full model details when submitting. [Elektroda, querij, post #19572095]
What boards and panel does the BS49E148BFJ0U0K10M use?
Reported hardware: main board T.MS3463S.771, LCD panel LC490DUY‑SHA1, and PSU MIP550D‑240V350 (Megmeet). These identifiers help you match firmware and dumps, and source compatible parts. [Elektroda, mechsteve, post #19569745]
Could shorted HDMI ports cause this boot loop?
Yes. Check HDMI ports for shorts before deeper rework. A short on 5V or data lines can stall initialization and trigger resets. A forum member specifically advised measuring HDMI ports for shorts during diagnosis. [Elektroda, querij, post #19577670]
Do I need to share a flash “dump” for analysis?
Yes. Posting a dump enables others to compare, repair, or regenerate your firmware. It is a standard first step when software faults are suspected. Community members asked for the original binary specifically for analysis. [Elektroda, jeloi, post #19581752]
How can I get a dump if the TV won’t boot past the splash screen?
Read the SPI flash with an external programmer. In‑system USB updates depend on a working bootloader, but programmers bypass that. As an expert put it, program the memory externally with the received file. [Elektroda, janomo, post #19610270]
Do these symptoms point to the main board or the power/backlight?
They point to the main board. The poster reported good picture and strong backlights, but a splash‑screen loop and no relay clicks. They suspected the main board based on these observations. [Elektroda, mechsteve, post #19575304]
What information will support ask me for?
Have the full serial/model ready. A helper requested the complete serial to escalate with Blaupunkt support. Providing exact identifiers speeds firmware matching and assistance. [Elektroda, querij, post #19590616]
How much does a replacement T.MS3463S.771 main board cost?
A used board was cited at around £70. That figure made the owner reconsider repair versus replacement. Factor your time and programming tools into the total repair cost. [Elektroda, mechsteve, post #19593008]
What if reprogramming the flash doesn’t stop the reboot loop?
If software recovery fails, the flash IC or main processor may be defective. At that point, replacing the board or chips becomes necessary. This is an edge case but does occur on this chassis. [Elektroda, querij, post #19579776]
Is there an SPI input or pads for in‑circuit work on this board?
Yes. A member referenced an SPI input for the same main board and panel combination. That implies accessible pads or a header for SPI flashing or probing. [Elektroda, Michał99, #19572074]
What if I decide not to repair after diagnosis?
That’s valid. The thread starter ultimately scrapped the set after attempts and cost considerations. If the economics or effort exceed value, recycling is reasonable. [Elektroda, mechsteve, post #19626368]
