FAQ
TL;DR: For Manta LED4004 on HK-T.RT2957P63, using a GigaDevice 25Q64 “works OK,” while cross-brand swaps trigger freezes; access Factory via MENU+1-1-4-7. [Elektroda, jaruszek, post #16738516]
Why it matters: This FAQ helps techs fix boot hangs and color issues on V400HJ6 A1/A2 panels fast, with verified dumps and menu paths.
Quick Facts
- Board/panel combo: HK-T.RT2957P63 with V400HJ6 matrices (A1/A2) used in LED4004 service cases. [Elektroda, gradek83, post #16741817]
- Symptom to diagnose: set powers, shows MANTA logo, then hangs after ST-BY wake. [Elektroda, Indyczes, post #16737963]
- Known-good flash family: GigaDevice GD25Q32/64; Winbond parts misbehave in these TVs. [Elektroda, rob1, post #16740560]
- Factory path for color swap: MENU → 1 1 4 7 → PANEL CONTROL → LVDS TI MODE (not persistent). [Elektroda, jaruszek, post #16738516]
- Budget option: pre-programmed SPI chip offered at about PLN 17 for this board. [Elektroda, gradek83, post #16741817]
What causes a Manta LED4004 to hang on the MANTA logo after standby?
Corrupted or mismatched SPI flash contents on the HK-T.RT2957P63 board commonly cause this freeze. A user reported the set powers, shows the MANTA logo, and stops responding after ST-BY. Reflashing a correct dump to a compatible GigaDevice chip resolves it. [Elektroda, Indyczes, post #16737963]
Which SPI flash brands work reliably on HK-T.RT2957P63?
Use GigaDevice GD25Q32CSIG or GD25Q64CSIG. Field reports state Winbond parts do not work properly in these models. As one expert put it, “only use originals.” This guidance targets the 40/50/55/95 series using similar mainboards. [Elektroda, rob1, post #16740560]
Can I drop in a Winbond 25Q64FVSIG instead of GigaDevice?
Avoid it. A 1:1 transfer from a working GigaDevice dump to Winbond allowed power-up but the TV hung on the logo. The same dump on a GigaDevice chip booted correctly. Cross-brand electrical nuances can break boot. [Elektroda, jaruszek, post #16738059]
Why did my TV not power from standby after flashing a Winbond chip?
A report notes that attempts to program Winbond led to a set that would not leave standby. The original chips read fine but resisted erase/write on two programmers, indicating device incompatibility or chip failure. Use new GD25Q64 parts. [Elektroda, Indyczes, post #16738360]
How do I fix wrong or inverted colors when swapping A1/A2 panels?
Color inversion appears when firmware or panel settings mismatch A1 vs A2. Enter Factory (MENU → 1 1 4 7), then toggle PANEL CONTROL → LVDS TI MODE ON/OFF. Note: changes do not persist after power cycling. [Elektroda, jaruszek, post #16738516]
How do I enter the Factory menu and try the LVDS fix?
Follow this 3-step sequence:
- On the remote, press MENU.
- Enter 1, 1, 4, 7 to open Factory.
- Go to PANEL CONTROL → set LVDS TI MODE to the opposite state.
Settings revert after power off. [Elektroda, jaruszek, post #16738516]
Do Factory menu color changes save after a reboot?
No. The setting helps you confirm the correct mode, but it does not save. After turning the TV off and on, the wrong colors return. Quote: “it is not possible to save the changes.” [Elektroda, jaruszek, post #16738516]
Where can I buy a pre-programmed SPI flash for this model and what does it cost?
A marketplace listing offers a programmed chip for the HK-T.RT2957P63 board with V400HJ6 panel for about PLN 17. This is a fast, low-cost path if you lack a clean dump. Verify A1 vs A2 before purchase. [Elektroda, gradek83, post #16741817]
I can read the original chip, but erasing or writing always fails. What now?
That behavior suggests the chip is locked, degraded, or simply incompatible with your programmers. One case confirmed read OK on two tools, but erase/write failed. Replace with a new GD25Q64CSIG and write a known-good dump. [Elektroda, Indyczes, post #16738360]
Is my fault in the mainboard or just the flash contents?
If a verified, working dump on a new GD25Q64 still hangs on MANTA logo when moved to a known-good board, then the original mainboard is defective. That test isolates a board-level fault beyond flash. [Elektroda, Indyczes, post #16741799]
What firmware or dump should I use for A1 vs A2 panels?
Use a dump matched to your panel revision. An A2 dump on A1 boots but shows wrong colors. Confirm panel label (V400HJ6-A1 or A2) and match the image accordingly. [Elektroda, jaruszek, post #16738059]
What exact hardware variants appear in these repairs?
Cases reference mainboard HK-T.RT2957P63 and panel V400HJ6, with explicit A1 labeling observed in service notes. Matching these IDs improves dump compatibility and reduces color issues. [Elektroda, curylop, post #16883576]
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