This update focuses on the most visual part of the cyberdeck: the screen.

The Nokia N97 originally used a TPO LTJ035L001A panel — a 3.5″ RGB interface TFT with no onboard controller. It connected via an FPC ribbon to the mainboard through the X4400 connector. While functional in its time, it’s not Pi-friendly: it lacks HDMI, SPI, or even I²C, and needs a parallel RGB driver (or something like an RTD2660H).

📸 Size Matters: Comparing Original vs. HDMI

I’ve been testing a 3.2″ HDMI TFT panel (Waveshare / Inanbo) as a replacement. I’ve included comparison shots of:

• The original Nokia display next to the HDMI panel

• Both displays in the N97 frame for visual reference

Surprisingly, the new display is almost a perfect mechanical fit — slightly smaller in width, which helps with routing, and thin enough to slide into the original mounting location with minimal modification.

✅ Why HDMI Wins

• Easy Pi compatibility: True plug-and-play, no controller needed

• Higher resolution (800×480 or better

• Will work with a custom low-profile driver board, which I plan to integrate into the main PCB

🔧 Notes

• Original display flex pinout is undocumented and not standard RGB

• I still plan to reuse the touchscreen from the original assembly (tested and working)

• Backlight wiring for the HDMI panel will be adapted to fit the N97 battery and boost converter setup

🛠 Next Up

• Start building the HDMI display support into the PCB layout

• Design the mounting system (clips or frame supports) to hold the display in place under the slider

• Route power, backlight, and touchscreen interface into the same board

Original LCD

Inanbo t32chrip51 v19

Original Left replacement Right