Your equipment still works. The display does not. And the original LCD module was discontinued years ago.
This is one of the most common situations we help engineers solve at CXW Display. The good news: almost every discontinued LCD can be cross-referenced or re-manufactured as a compatible module—if you gather the right information first. This guide walks you through exactly what to collect, in the order a display engineer would ask for it.
Step 1: Find the Part Number on the Old Display
Power down the equipment, remove the display module, and check these locations:
- The FPC (flex cable): Part numbers are often printed directly on the flexible ribbon cable.
- A label on the back of the module: Usually a white or silver sticker with the manufacturer name and model, such as AUO, Innolux, Tianma or BOE followed by a code like G070VW01 V.0.
- Silkscreen printing on the PCB: Check the attached driver board when the module includes one.
- The equipment's service manual or BOM: Maintenance documentation often lists the display as a spare part.
Photograph every marking you find, even ones that look irrelevant. A partial code plus the panel dimensions is often enough for an experienced supplier to identify the exact panel family.
Step 2: Measure the Panel
If no part number survives, physical dimensions become the primary identifier. Measure with calipers if possible:
| Measurement | What to record |
|---|---|
| Outline dimensions | Width × height × thickness of the whole module (mm) |
| Active area | The area that actually lights up (mm) |
| Diagonal size | Corner to corner of the active area (inches) |
| Mounting | Position and diameter of mounting holes, or bracket type |
| FPC position | Which edge the cable exits from, and its length |
Outline and active area together narrow the field dramatically—most panel sizes follow industry-standard footprints.
Step 3: Identify the Interface and Connector
This determines whether a replacement can be a true drop-in or will need adaptation:
- Count the pins: Record the connector or FPC pin count, such as 40-pin or 50-pin.
- Note the connector type: Identify whether it is a ZIF/FFC flat cable, board-to-board connector or soldered connection.
- Identify the signal interface: Look for MCU (8080/6800), SPI, RGB, LVDS or MIPI DSI in the documentation. Older industrial equipment most commonly uses RGB or MCU interfaces; newer designs use LVDS or MIPI.
- Record the operating voltage: Check the module or service manual for 3.3 V or 5 V logic and the backlight voltage.
If you cannot determine the interface, do not worry—a clear photograph of the connector and an accurate pin count lets a display engineer infer it in many cases.
Step 4: Note the Display Characteristics
These details ensure the replacement looks and behaves like the original:
- Resolution: Use the equipment specification sheet or service manual.
- Brightness class: A sunlight-readable display is likely 800+ nits, while an indoor-only panel is commonly 250–400 nits.
- Touch: Determine whether it is resistive, capacitive or has no touch function.
- Temperature environment: Record whether the equipment operates outdoors, in a vehicle or in a heated indoor space to determine whether a wide-temperature panel is required.
- Polarizer type: Note whether the panel is transmissive or transflective, especially for older monochrome and industrial displays.
Step 5: Package Everything Into an RFQ
A complete inquiry gets you an accurate answer in one round instead of five. Send your supplier:
- All photographs: the front of the display, powered on if possible, the back label and a close-up of the FPC or connector.
- Every part number you found, from both the panel maker and the equipment maker.
- The outline, active-area, mounting and FPC measurements from Step 2.
- The pin count and connector photographs from Step 3.
- The equipment make and model—this alone often identifies the display through a cross-reference.
- The quantity needed: a one-time repair batch or ongoing production supply.
With this package, an experienced supplier can usually confirm compatibility and quote within a couple of working days, and deliver a drop-in-compatible sample in 2–4 weeks.
What If No Exact Match Exists?
Sometimes the original panel family is fully extinct. Three paths remain:
- Form-fit-function compatible re-manufacture: A new module is built to match the original outline, connector and interface timing, so the equipment does not know the difference.
- Adapter solution: A modern panel and a small interface or converter board are fitted within the original mounting space.
- Upgrade path: For equipment already being redesigned, use a modern TFT with better brightness and lifespan in the same footprint.
Which path makes sense depends on your volumes and whether the equipment firmware can be changed. A good supplier will explain the trade-offs rather than force one option.