FAQ
TL;DR: 3 users confirmed fixing the logo–reboot by reflashing the 32 Mbit (4 MB) GD25Q32; “Post #2 needs a programmer to program U2 GD25Q32.” [Elektroda, Acca85, #17987658; Elektroda, roudany, #21195437; GigaDevice, 2019; Elektroda, Michał99, #18693587]. For TP.S506.PB818 owners/techs needing a working dump.
Why it matters: It points you to the exact fix, file, and tools to revive boot‑looping 32-inch sets.
Quick Facts
- Mainboard: TP.S506.PB818; SPI flash: GD25Q32 32 Mbit (4 MB) at U2 (SOIC‑8). [Elektroda, Michał99, #18693587; GigaDevice, 2019]
- Symptom: logo then reboot; reflash of full dump confirmed fixed by at least 3 users. [Elektroda, Acca85, #17987658; Elektroda, roudany, #21195437; Elektroda, radwanwell, #21257906]
- USB update isn’t feasible in boot‑loops; use an external SPI programmer (e.g., CH341A). [Elektroda, DreddyFykk, #18623097; Elektroda, Michał99, #18693587; Elektroda, jeloi, #19028867]
- Match board/panel labels when choosing dumps (e.g., CV320PW03S, AJ32T03). [Elektroda, Acca85, #17983487; Elektroda, woojczi, #18692689]
- Related models reported: Master TL321, Krohler 32, Startlight SL 32 E31S, Condor LHD 32 K 2206 W. [Elektroda, Acca85, #17983487; Elektroda, roudany, #21195437; Elektroda, Touaguine Mohamed, #18410883]
How do I fix a Master TL321 / TP.S506.PB818 TV that reboots after the logo?
Reflash the U2 SPI flash (GD25Q32) with the working dump, then power‑cycle. Users confirmed this resolves the boot‑loop. [Elektroda, ODARROC, #17985543; Elektroda, Acca85, #17987658; Elektroda, roudany, #21195437] You need an external programmer, not USB. [Elektroda, Michał99, #18693587] Ensure the dump matches your board and panel (CV320PW03S / AJ32T03) to avoid mismatches. [Elektroda, Acca85, #17983487; Elektroda, woojczi, #18692689]
Where can I download the working dump for TP.S506.PB818 (CV320PW03S)?
It’s attached in post #2 by ODARROC. The original poster confirmed: “Firmware worked flawlessly.” [Elektroda, ODARROC, #17985543; Elektroda, Acca85, #17987658] Later posts thanked for successful repairs, reinforcing that the file works. [Elektroda, roudany, #21195437; Elektroda, radwanwell, #21257906]
Can I update via USB (.bin) if the TV keeps rebooting?
No. In boot‑loops, the set won’t reliably enter USB update mode; you must program the flash externally. “Post # 2 needs a programmer to program U2 GD25Q32.” [Elektroda, Michał99, #18693587] The reboot prevents menu access, as reported by another user. [Elektroda, DreddyFykk, post #18623097]
What chip stores the firmware, and what size is it?
U2 is a GD25Q32 SPI NOR flash, 32 Mbit (4 MB), 8‑pin SOIC. [Elektroda, Michał99, #18693587; GigaDevice, 2019] Typical endurance is 100,000 erase/program cycles. [GigaDevice, 2019] The full dump you write should match the 4 MB capacity. [GigaDevice, 2019]
What tools do I need, and how much does it cost?
Use a USB SPI programmer (e.g., CH341A) and a SOIC‑8 clip or hot‑air for chip removal. [Elektroda, jeloi, post #19028867] CH341A kits are low‑cost (approx. US$3–$10), widely available online. [“CH341A USB SPI programmer — AliExpress listing”] Ensure ESD safety and stable 3.3 V for the flash. [GigaDevice, 2019]
How do I program the dump onto the GD25Q32?
- Identify U2 (GD25Q32) and back up the original content using your programmer. [Elektroda, Michał99, #18693587; GigaDevice, 2019]
- Erase, write the 4 MB dump, then verify the write completes without errors. [GigaDevice, 2019]
- Refit or disconnect the clip, reassemble, and power‑cycle the TV. [Elektroda, Acca85, post #17987658] If verification fails in‑circuit, remove the chip or isolate HOLD#/WP# lines. [GigaDevice, 2019]
Will this PB818 dump work for TP.S506.PB801 or a panel AJ32T03‑v04?
Not guaranteed. A user with PB801 asked for a separate dump, indicating differences. [Elektroda, woojczi, post #18692689] Use dumps that match both the board version and panel identifiers printed on your set. [Elektroda, Acca85, post #17983487] If mismatched, functionality or image parameters can be wrong, so source a PB801‑specific dump. [Elektroda, woojczi, post #18692689]
I can’t access the menu. How did you dump the files if it reboots?
You don’t use the TV menu. Remove or clip to the U2 SPI flash and read/write it with an external programmer. [Elektroda, DreddyFykk, #18623097; Elektroda, Michał99, #18693587] CH341A with SOIC‑8 clip is a common approach. [Elektroda, jeloi, post #19028867] The chip fully supports standard read/erase/write commands for off‑board programming. [GigaDevice, 2019]
What if in‑circuit programming fails or verify errors appear?
That can happen if the main SoC holds the SPI bus. Try powering the board in standby, isolating HOLD#/WP#, or remove the chip to program it off‑board. [GigaDevice, 2019] Proceed only after a clean verify to avoid a partial write and renewed boot‑loops. [GigaDevice, 2019]
Which brands/models have reported success with this dump?
Master TL321 (original case) and a Krohler 32 were reported working after applying the dump. [Elektroda, Acca85, #17987658; Elektroda, roudany, #21195437] Additional thanks in‑thread suggest more successful repairs. [Elektroda, radwanwell, post #21257906]
Will a factory reset or service remote fix the loop?
Unlikely. The boot‑loop blocks menu access, and users resolved it only after reflashing U2 with the dump. [Elektroda, DreddyFykk, #18623097; Elektroda, Acca85, #17987658] As one expert summarized: “Post # 2 needs a programmer to program U2 GD25Q32.” [Elektroda, Michał99, #18693587]
What file format and size should I flash?
Use a raw binary (.bin) full‑flash image sized to the memory capacity, i.e., 4,096 KB for GD25Q32. [GigaDevice, 2019] The attached file in post #2 is the working full dump referenced by successful repairs. [Elektroda, ODARROC, #17985543; Elektroda, Acca85, #17987658]
