Overview
This professional firmware resource provides a fully tested SPI memory dump for the Listo 40DLEDUSB-114 television equipped with the CV9202H-DPW main board. The dump targets the 25Q32 SPI flash memory chip and has been programmed and verified using the SP8 programmer. This file is intended exclusively for qualified electronics technicians performing board-level TV repair.
If your Listo 40DLEDUSB-114 unit exhibits boot failure, stuck logo, no display output, corrupted firmware, or any memory-related malfunction, this dump is engineered to restore full operational functionality to the mainboard.
Hardware Specifications
| Brand | Listo |
|---|---|
| Model | 40DLEDUSB-114 |
| Main Board | CV9202H-DPW |
| Panel | SM400SZ803 |
| SPI Flash Memory | 25Q32 (32 Mbit / 4 MB) |
| Programmer Method | SP8 Programmer |
| Firmware Status | Tested 100% Working |
| File Type | BIN (SPI Dump) |
Mainboard Reference Image
Use the image below to identify and confirm the CV9202H-DPW mainboard before proceeding with the firmware flash procedure. Click the image to zoom in a new tab.
CV9202H-DPW Mainboard – Click to zoom in new tab
SPI Memory Chip Location
Locate the 25Q32 SPI flash IC on the CV9202H-DPW board. The chip is typically positioned near the main processor. Refer to the image below for the exact placement. Click to zoom in a new tab.
SPI 25Q32 Flash Memory IC Location – Click to zoom in new tab
Common Issues – Listo 40DLEDUSB-114 (CV9202H-DPW)
The following symptoms indicate corrupted or damaged SPI firmware on this model. If your unit presents any of these issues, a fresh firmware dump flash is the recommended repair path:
- Dead TV – No Power Response: The unit does not react to power button or remote. Standby LED remains off despite confirmed good power supply output.
- Stuck on Boot Logo: The Listo logo appears on screen but the TV never progresses to the home screen or input source. Infinite boot loop detected.
- Backlight On, No Image: The backlight activates (screen glows) but no OSD, logo, or picture is displayed. Audio may or may not be present.
- Automatic Restart Loop: The TV powers on, briefly shows a picture or logo, then shuts off and restarts repeatedly without user input.
- No Audio Output: The display works but all audio channels produce no sound. Volume OSD functions but no signal reaches the speaker amplifier.
- Corrupted OSD / Menu Glitches: On-screen display shows garbled text, distorted icons, missing menu items, or the menu fails to open entirely.
- HDMI / USB Ports Not Recognized: External devices connected via HDMI or USB are not detected. No signal message despite functional source devices.
- Channel Scan Failure: Auto-tuning finds zero channels or crashes mid-scan. The tuner module receives signal but firmware cannot process channel data.
- Firmware Update Failure Recovery: A previous OTA or USB firmware update was interrupted or failed, leaving the SPI flash in a partially written or corrupted state.
- Standby LED Blinks but TV Does Not Start: The standby indicator blinks in a pattern but the mainboard fails to fully initialize. Indicates SPI read error during boot sequence.
Diagnostic and Repair Protocol
Follow this systematic diagnostic and repair procedure before and after flashing the SPI dump. Each step is critical to ensure a successful and lasting repair.
Pre-Flash Diagnostics
1
Visual Board Inspection: Examine the CV9202H-DPW mainboard thoroughly for any burnt components, swollen capacitors, cracked solder joints, or corrosion. Repair any physical damage before proceeding with firmware work.
2
Power Supply Verification: Using a multimeter, confirm all voltage rails from the power supply board are within specification: 5V standby, 12V main, and 24V backlight driver. Unstable power can corrupt SPI memory during operation.
3
SPI Chip Integrity Check: Desolder or use an in-circuit clip to connect the 25Q32 SPI chip to your SP8 programmer. Read the existing firmware content. If the read returns all 0xFF or shows checksum errors, the chip data is confirmed corrupted and requires a fresh dump.
4
Backup Original Dump: Even if the existing firmware is corrupted, always save a backup copy of the original chip content before erasing. This provides a recovery reference if needed.
SPI Flash Programming Procedure
5
Erase the 25Q32 Chip: Using the SP8 programmer software, perform a full chip erase on the 25Q32 SPI flash IC. Verify that the erase operation completes successfully with all memory addresses reading 0xFF.
6
Write the Firmware Dump: Load the downloaded BIN file into the SP8 software. Select the correct chip model (25Q32 / W25Q32). Execute the write operation. Do not interrupt power or disconnect the programmer during this process.
7
Verify After Write: Run the verify function in the SP8 software to compare the written data against the source BIN file. The verification must pass with zero errors. If errors are found, erase and repeat the write cycle. Replace the SPI chip if verification continues to fail.
Post-Flash Testing
8
Resolder and Reassemble: If the chip was desoldered, carefully resolder it to the CV9202H-DPW board ensuring correct pin 1 orientation. Inspect solder joints under magnification for bridges or cold joints.
9
Initial Power-On Test: Connect the power supply and panel. Power on the TV. The Listo logo should appear within 3 to 5 seconds. The TV should fully boot to the initial setup wizard or last configured state.
10
Full Functional Verification: Test all functions systematically: HDMI inputs (all ports), USB media playback, channel auto-scan, audio output (speakers and headphone jack), remote control response, OSD menu navigation, and power on/off cycling (minimum 5 cycles).
11
Panel Calibration Check: Confirm the display output matches the SM400SZ803 panel specifications. Verify correct resolution, color balance, and backlight uniformity. If the image appears shifted, distorted, or has incorrect colors, a panel configuration adjustment within the service menu may be required.
Important: This firmware dump is specific to the CV9202H-DPW mainboard paired with the SM400SZ803 panel. Using this dump on a different mainboard revision or panel model may result in display malfunction or further damage. Always verify your hardware configuration matches the specifications listed above before flashing.
Download SPI Firmware Dump
CV9202H-DPW | Listo 40DLEDUSB-114 | SPI 25Q32 | SP8 Programmer
File Format: BIN
Memory: 25Q32 (4 MB)
Programmer: SP8
Status: Tested and Verified
Memory: 25Q32 (4 MB)
Programmer: SP8
Status: Tested and Verified
Click the button to begin the download process
Programming Notes for Technicians
- Ensure your SP8 programmer firmware is updated to the latest version for reliable 25Q32 chip communication.
- Use a quality SOP8 test clip or desolder the chip for best results. In-circuit programming may fail due to interference from surrounding components on the CV9202H-DPW board.
- If the original 25Q32 chip is damaged beyond recovery (failed erase, write, or verify), replace it with a new W25Q32FVSIG or equivalent 32 Mbit SPI flash IC.
- After successful flash and boot, perform a factory reset from the service menu to initialize all parameters correctly for the SM400SZ803 panel.
- Keep a copy of this tested dump archived in your technician library for future repairs of the same model.
