FAQ
TL;DR: For Sharp LC-43CFE6242E (TP.MS6308.B711), 100% of fixes here came from replacing the preprogrammed NAND. "Problem solved with a preprogrammed NAND." Use UART usb_bin_check to validate a USB firmware if you’re stuck in a blinking-LED boot loop. [Elektroda, mekademi20001, post #20652244]
Why it matters: This FAQ helps Sharp TP.MS6308 owners recover wrong-firmware bricks, LED blinking, and boot loops quickly and safely.
Quick Facts
- Set identification: Sharp LC-43CFE6242E using main board TP.MS6308.B711; match firmware to this board ID to avoid bricking. [Elektroda, mekademi20001, post #20340381]
- USB attempts: FAT-formatted stick used; TV LED went green and backlight lit, but update didn’t start by holding Power. [Elektroda, mekademi20001, post #20360951]
- Forced recovery: Over UART (SecureCRT/PuTTY), run usb_bin_check with firmware inserted, then AC power-cycle to trigger on‑screen upgrade. [Elektroda, mekademi20001, post #20364638]
- Post-update boot loop: If it still loops at SHARP logo after a “successful” flash, a preprogrammed NAND replacement resolved it. [Elektroda, mekademi20001, post #20652244]
- Official path: Request firmware from Sharp with label photos and fault description for model‑correct software. [Elektroda, Aquario_blue, post #20364723]
How do I recover a Sharp LC-43CFE6242E that blinks and won’t boot?
If a USB flash fails and the set boot-loops, replace the preprogrammed NAND. That was the definitive fix reported here. Firmware flashes that appeared successful still rebooted at the logo. Using a known-good, preprogrammed NAND restored normal operation immediately. [Elektroda, mekademi20001, post #20652244]
How do I force a USB firmware update using SecureCRT or PuTTY?
Use the UART method:
- Connect SecureCRT/PuTTY to the TV’s UART header.
- Insert a USB stick with the correct firmware and run usb_bin_check.
- When it reports OK, disconnect AC for a few seconds, then plug back to auto‑start the upgrade on-screen. [Elektroda, mekademi20001, post #20364638]
Why does my TV show the SHARP logo then restart in a loop after update?
This indicates the flash passed but the system still fails to boot. In the report, upgrades completed and displayed progress, yet the TV kept looping at the logo. That edge case pointed to NAND content issues, later solved by replacing the NAND. [Elektroda, mekademi20001, post #20364638]
What does the red/green LED blinking indicate after a wrong firmware?
In this case, the TV alternated red and green after loading an incorrect software build. The LED turned green and the backlight lit when a USB was tried, but no update started. That behavior aligned with a firmware mismatch or blocked update. [Elektroda, mekademi20001, post #20360951]
What USB format and steps should I use for this Sharp?
Format the USB to FAT, place the firmware at the root, and insert it before applying AC power. Trying different USB sticks alone did not start the update here. Holding the TV power button also did not trigger an automatic flash on this set. [Elektroda, mekademi20001, post #20360951]
Is it normal to have only one firmware file on the USB?
Packages can vary. Don’t rely on file count; validate with usb_bin_check over UART. If usb_bin_check returns OK and you power-cycle as instructed, the set should start the on‑screen upgrade regardless of how many files are present. [Elektroda, mekademi20001, post #20364638]
Where can I get the official firmware for LC-43CFE6242E?
Contact Sharp support with a clear photo of the label and a fault description. “Ask Sharp for the software.” Users report they usually provide model-correct firmware once they verify details. [Elektroda, Aquario_blue, post #20364723]
How long might Sharp take to respond to a firmware request?
One user reported waiting over a week without a reply. Plan for delays and keep your recovery path ready, especially if the TV is down. This timing data helps set expectations for urgent repairs. [Elektroda, mekademi20001, post #20365662]
The USB upgrade shows an error. What should I try next?
An upgrade error indicates an incompatible or incorrect package for your main board. Confirm the board ID TP.MS6308.B711 and validate the package via usb_bin_check. Using a mismatched build will be rejected or fail to boot. [Elektroda, mekademi20001, post #20364638]
Can I read or back up the NAND without removing it?
Yes. A user read the NAND using a programmer and also via terminal tools like PuTTY/SecureCRT. This enables backups or analysis before hardware replacement, which can save time during diagnosis. [Elektroda, mekademi20001, post #20367737]
Which identifiers must match the firmware on this model?
Record the exact model (LC-43CFE6242E) and main board (TP.MS6308.B711). These identifiers determine the compatible firmware. Using firmware for the wrong board risks boot loops or total failure. [Elektroda, mekademi20001, post #20340381]
Do I need to hold the TV power button during a USB update?
That did not help in this case. The user held Power for an extended period and saw only a green LED and dark backlight. The update did not start until using the UART usb_bin_check method. [Elektroda, mekademi20001, post #20360951]
Can someone share a NAND dump for this TV?
Requests were made, and reading methods were discussed. However, the original poster later no longer had the set after fixing it with a preprogrammed NAND, so no dump was shared thereafter. [Elektroda, mekademi20001, post #20652239]
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