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Industrial Controller Repair

ESA VT300 operator panel (HMI): blurry display replaced

An ESA VT300 operator panel powered on but its display was blurry. The keypad tested fine, so we took the panel apart, replaced the display module on its driver board with a brand-new one and reassembled it. The panel works properly again.

ESA VT300 Operator Panel · LCD Module Replaced · Keypad Tested

Engineering category
Industrial Controller Repair
Equipment model
ESA VT300 operator panel (HMI)
Service
Industrial Controller Repair
Repair date
October 2026

The repair, step by step

Illustrative 3D model drawn in code to explain the repair. Not a photograph of the customer's equipment.

  1. 1Blurry display

    The screen is blurry; every keypad button is tested and works.

  2. 2Opened up

    Rear cover screws, rear cover and main board come out.

  3. 3Old display off

    The display assembly comes out and the old LCD module is taken off its driver board.

  4. 4New display, reassembled

    A brand-new LCD module goes on, and everything goes back in reverse order.

  5. 5Retest

    The screen is clear and the panel operates properly.

01

Problem description

The panel powered on, but the display was blurry (still readable).

02

Confirmed findings

  • Power-on was normal.
  • Every keypad button was tested and worked; the fault was in the display itself.

03

Likely cause (not confirmed)

  • The LCD module itself had degraded: power and keypad tested normal, and a new module fixed the display. The module was not analysed further.

04

Repair / engineering method

  • After the customer approved the quotation, opened the panel from the back: rear cover, then the main board.
  • Took out the display assembly and replaced the LCD module on its driver board with a brand-new one.
  • Reassembled the panel in reverse order.

05

Tests performed

  • Retest: the display is clear and the panel operates properly.

06

Final result

New display fitted; the operator panel is clear and working again.

Manufacturer and model names are used only to identify the equipment we repaired. All trademarks belong to their owners; X TRONIC AUTOMATION is an independent repair service and is not affiliated with or endorsed by the manufacturer.

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