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Nikai TV TP.SK506S.PB802 Vertical Lines & Remote Not Working After Akai Firmware Flash

User question

i flashed a firmware for my nikai tv as it was stuck on wisdom share screen, it was the same firmware TP.SK506S.PB802
And now the tv remote is not working as i booted a Akai firmware, and the now the screen has vertical lines. i managed to get into the factory menu. is there anything that i can do from there to fix this

Artificial Intelligence Response

Direct answer to the question

  • Yes, there are two things you can still do from the factory (service) menu of a TP.SK506S.PB802 board:
    1. Try to select the correct “Project / Panel ID” and “IR / Remote type” so the picture and remote start working again without reflashing.
    2. If that fails, use the factory‐menu “USB Upgrade” (or the hardware button-boot procedure) to re-flash the ORIGINAL Nikai firmware that matches your exact TV model and LCD panel.
  • The vertical lines are almost always an LVDS-timing (panel parameter) mismatch, not a damaged panel, and the remote failure is an IR-code set mismatch—both can be fixed by the right firmware or the right parameter set.

Detailed problem analysis

  1. Board architecture
    • TP.SK506S.PB802 is a “universal” single-board TV chassis.
    • One binary image contains:
    – LCD-panel timing table (resolution, LVDS mapping, VCOM, SSC).
    – IR key table (remote codes).
    – NVM defaults (ADC calibrations, TCON options, brand logo, EDID).
    • When you loaded the Akai image the board booted, but:
    – Panel parameters ≠ your Nikai panel → vertical lines / colour bars.
    – IR table ≠ Nikai remote → remote appears dead.

  2. Factory-menu capabilities
    The hidden menu (often

    + <8><8><9><3> or Vol-/CH- sequences) exposes:
    • “Project ID” or “Model Select” – selects one of ~50 preset tables inside the bin.
    • “Panel Setting” – manual LVDS bit-mapping (JEIDA/VESA), 6/8/10 bit, DE style.
    • “LVDS Swing / VCOM” – fine tuning, rarely needed for gross vertical lines.
    • “IR Group / IR Key Table” – NEC, RC5, RC6 variants used by each brand.
    • “USB Upgrade / Mboot Upgrade” – invokes boot-loader to flash from USB.
    • “NVM / EEPROM clear” – resets user and calibration data.

  3. Why the picture shows vertical lines
    • Wrong LVDS map: e.g. panel expects JEIDA-8bit but firmware outputs VESA-8bit.
    • Wrong pixel clock polarity or DE polarity.
    • Wrong resolution (e.g. firmware set to 1366×768 but panel is 1920×1080).

  4. Why the remote is dead
    • Akai uses a different NEC address (0x00FF) while Nikai uses e.g. 0xA55A.
    • Board is still receiving IR but discards codes that do not match the table.


Current information and trends

• Modern “combo” boards (RTD2662, MSD3463, MSD6A338, TP.SK506S etc.) all embed multi-brand parameter tables for cost-down manufacturing.
• Repair forums (e.g., Elektrotanya, BadCaps, TVWiki) share “project ID lists” so you can match your LCD panel without re-flashing.
• Vendors now publish OTA/USB packages signed with RSA to minimise cross-flashing accidents; universal boards remain unsigned, so wrong images can still be installed.


Supporting explanations and details

• LVDS mapping example:

Panel expects R7…R0 on pairs 0-1, G7…G0 on pairs 2-3, B7…B0 on pairs 4-5.
Akai image may output JEIDA where MSB/LSB are swapped → every second column is wrong → vertical stripes.

• IR table:

NEC code structure = 16-bit address + 16-bit command. If address mismatches, firmware discards command.

• Factory menu hierarchy (typical for TP.SK506S):
– Option → Panel Setting → SelectID (0-255)
– Option → Remote → IR Selection (0: NEC-00FF, 1: NEC-A55A, 2: RC5, …)
– Hotel / Clone → USB Clone → Upgrade Main → select bin


Ethical and legal aspects

• Flashing non-official firmware may void warranty and can violate manufacturer licensing (logos, DRM keys).
• Distribute or download copyrighted binaries only from sources authorised by Nikai.
• Electric-shock risk: keep mains unplugged when accessing internals.


Practical guidelines

  1. Record everything first
    • Photograph each factory-menu page; write down the current values.

  2. Try to fix without reflashing
    a) Enter Factory → Option → Project/Panel ID.
    – Scroll through IDs, apply, power-cycle.
    – Stop as soon as picture becomes normal (no lines).
    b) Go to Remote/IR table and choose other IR groups; test with remote each time.

  3. If no ID works → re-flash correct firmware
    a) Identify TV exactly: model label + panel sticker (e.g., LSC400HN03).
    b) Download Nikai firmware that explicitly lists that panel or your TV model.
    c) Prepare USB (FAT32), copy bin, rename to “upgrade_506s.bin” if instructions say so.
    d) Unplug TV, insert USB, hold physical POWER button, plug mains; LED will blink.
    e) Wait 3-5 min until LED stops/flashes rapidly and TV restarts; remove USB.

  4. Remote still dead?
    • Clear NVM in factory menu.
    • If IR receiver diode was disabled in settings, re-enable “IR Function: ON”.
    • As a workaround, program a universal NEC remote with Akai codes until fixed.

  5. Common pitfalls
    • Do NOT interrupt power during flash – it corrupts bootloader (needs SPI programmer).
    • Do NOT choose “LVDS 10-bit” on an 8-bit panel – screen can go blank permanently until reflash.


Possible disclaimers or additional notes

• If the TV freezes during USB update or shows only backlight, the SPI flash may need external programming with CH341A.
• Some Nikai sets use different mainboards (e.g., VS.TP56U, CVT.ST59L) even with the same casing—ensure board code printed on PCB matches firmware package.


Suggestions for further research

• Search your panel number + “panel table TP.SK506S” – often yields exact “SelectID” value.
• Join repair communities (BadCaps forum, Facebook “TV Repair Help”) and request the dump for your Nikai model.
• Consider backing up the working firmware once repaired using SPI clip + flashrom for future safety.


Brief summary

The Akai firmware boots because the TP.SK506S.PB802 hardware is common, but its internal tables do not match your Nikai LCD panel or remote.
First, in the factory menu, cycle through “Project/Panel ID” and “IR Selection” until the stripes disappear and the remote responds.
If no combination works, download and flash the genuine Nikai firmware via the board’s USB-upgrade function.
Proceed methodically, document each change, and avoid power interruptions; with the correct panel parameters or firmware the picture and remote will return to normal without permanent damage.

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.