FAQ
TL;DR: 25–30 TVs can need resets in hotels; "I working in a hotel maintaining person." This FAQ explains USB firmware updates, panel data loading, and PIN recovery for Grundig 22 VLE sets showing blue-LED/no-picture on TF chassis. [Elektroda, albertscode, post #21013381]
Why it matters: It gives techs and hotel staff a fast, repeatable path to revive these TVs without board swaps.
Quick Facts
- Main board noted: VTT190R-3 V-0 on a 22 VLE 6320 BP unit. [Elektroda, IMAXA, post #19606017]
- Panel reported in this case: T215HVN0 1.0. [Elektroda, IMAXA, post #19639559]
- TF-chassis USB update: format USB FAT32, unzip software, hold P+ while plugging AC until the update bar appears. [Elektroda, yokoono51, post #21013540]
- Panel Data update: copy Panel.bin to binfiles/keys, hold P- (joystick down) and plug AC. [Elektroda, arizanotu, post #19628743]
- Failure symptom seen: blue LED blinks then stays solid, with no image or sound. [Elektroda, IMAXA, post #19640905]
How do I update firmware on a Grundig TF-chassis TV via USB?
Format a USB stick as FAT32 and unzip the manufacturer software to it. Insert the USB stick into the TV. Press and hold the P+ key on the TV. Plug in the TV’s power. Release the key when the update bar appears. This invokes the TV’s update mode and re-flashes the software. “Press and hold the P+ key on the TV.” [Elektroda, yokoono51, post #21013540]
Where can I download the firmware and panel files referenced in this thread?
A helper shared links to USB Firmware, the Software Update Procedure, and Panel Files in one post. Use those packages and follow the described steps to update software and, if needed, load panel data. The same post explains how to trigger the panel-data update with the TV’s keys. [Elektroda, arizanotu, post #19628743]
How do I load panel data (Panel.bin) after a firmware flash?
Use the Panel Data Update Procedure. 1) Extract Panel.bin to a USB in binfiles/keys. 2) Insert the USB. 3) Press and hold P- (joystick down) and plug in AC power to start the panel-data load. “Press and hold P- button (joystick down) and plugin ac cable.” [Elektroda, arizanotu, post #19628743]
What does the P+ startup combination do?
On TF chassis, holding P+ during power-on starts the USB software update routine. Keep holding until the update bar appears, then release. This is the manufacturer’s documented path for in-field software recovery using a FAT32 USB stick. [Elektroda, yokoono51, post #21013540]
What does the P- (joystick down) startup combination do?
It invokes the panel-data loader when a valid Panel.bin is present on the USB. Place Panel.bin under binfiles/keys. Hold P- (joystick down) while plugging AC, and the TV will load panel configuration from the stick. [Elektroda, arizanotu, post #19628743]
My TV shows a blue LED but no picture or sound. What should I try next?
This symptom was reported after flashing a certain firmware: the blue LED blinked, then stayed solid, with no image or audio. Re-run the USB update using a different known-good package, then apply the panel-data procedure if required. That sequence restored functionality for others in this thread. [Elektroda, IMAXA, post #19640905]
Does directly programming the memory (flash) fix the issue if USB fails?
One report installed a BIN directly into memory, but the set did not start. The blue LED stayed on solid with no image or audio. This edge case suggests that direct programming alone may not resolve boot problems without the correct dataset. [Elektroda, IMAXA, post #19639559]
It powers on after flashing, but image and sound still fail. What should I try?
Load the correct panel data via USB. Extract Panel.bin to binfiles/keys on a FAT32 stick. Hold P- (joystick down) while plugging AC to write the panel configuration. This step aligns display/audio parameters with the installed firmware. [Elektroda, arizanotu, post #19628743]
Was a working firmware package eventually confirmed here?
Yes. The original poster later confirmed success with a shared package. As they wrote, “ok este funciona.” That indicates at least one combination of firmware and panel data restored normal operation. [Elektroda, IMAXA, post #19876358]
I forgot the PIN on a 22 VLE 7120 BF. How can I recover the TV?
Use the manufacturer software for the TF chassis via USB. Unzip to a FAT32 stick, insert it, hold P+ on the TV, then plug in power. Release when the update bar appears to run the update. “Press and hold the P+ key on the TV.” [Elektroda, yokoono51, post #21013540]
Which panel model was mentioned in the 22-inch case here?
The set referenced used panel T215HVN0 1.0. If your unit uses a different panel, expect to load the corresponding panel data file after the firmware update. That ensures the TV matches its display hardware. [Elektroda, IMAXA, post #19639559]
What exact model and mainboard did the original poster report?
They reported a Grundig 22 VLE 6320 BP with main board VTT190R-3 V-0. Knowing the main board and variant helps you pick the correct software and panel data package for a successful restore. [Elektroda, IMAXA, post #19606017]
How should I format the USB and place files for a TF-chassis update?
Format the USB stick as FAT32. Unzip the manufacturer software onto the USB (root is typical). Insert the USB, hold P+, and then plug in AC power to start the update. Release the key when the progress bar appears on-screen. [Elektroda, yokoono51, post #21013540]
How will I know the update actually started?
You will see an on-screen update bar. Only release the P+ key once that bar appears. If no bar appears, recheck the FAT32 format and file placement, then try again. “When the update bar appears, release the key.” [Elektroda, yokoono51, post #21013540]
Can this process scale when servicing many hotel TVs?
Yes. One maintainer faced 25–30 TVs with PIN issues. The USB update method with P+ offers a repeatable workflow to refresh software and reset problematic states across multiple sets efficiently. Standardize your USB and steps to speed throughput. [Elektroda, albertscode, post #21013381]
30 TV
