Siemens MP377 Touch repair and refurbishment.
Backlight conversion, touchscreen replacement, and component-level repair for the Siemens MP377. Engineer-led, no fix no fee.
MP377 repair and refurbishment
The Siemens MP377 Touch is a large-format SIMATIC panel available in 12-inch, 15-inch, and 19-inch screen sizes. Discontinued around 2012 alongside the MP277, the MP377 remains in service across UK manufacturing where its larger display is used for complex process visualisation. The same CCFL backlight and resistive touchscreen failure modes affect all screen sizes, and migration costs are similarly high at £5,000 to £15,000 or more.
Common MP377 faults we fix
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CCFL backlight failure across all screen sizes — the 15-inch and 19-inch variants use multiple CCFL tubes, and failure of any single tube affects the entire display
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Resistive touchscreen digitizer wear causing unresponsive areas and calibration errors on the larger touch surface
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Electrolytic capacitor degradation in the power supply section — larger screen sizes draw more power, accelerating capacitor aging
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LCD panel degradation causing colour shift, dead pixels, or partial display blanking after extended continuous operation
How it works
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1
Send details
Share the panel model, fault symptoms, and any photos or error codes.
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2
Diagnostics
Bench diagnostics isolate the fault and scope the repair.
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3
Repair, Refurbish & Test
Component-level repair with functional verification before return.
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4
Return to service
Confirmed results and return logistics for your panel.
Why Electron Lab
- Engineer-led bench diagnostics
- Component-level repair and rework
- Tested Before Return
- Clear, fast quoting
MP377 repair FAQs
Do you repair all screen sizes of the MP377?
Yes. We service the 12-inch, 15-inch, and 19-inch MP377 Touch variants. Each screen size has specific aftermarket parts for the LCD, touchscreen, and backlight assembly.
Can you replace the LCD on a 19-inch MP377?
Yes. We source aftermarket LCD panels for all MP377 screen sizes. LCD replacement is carried out with full functional verification and touchscreen recalibration before return.
My MP377 has multiple faults — is it still worth repairing?
We assess each unit individually. Where multiple faults are present, we scope all required repairs and provide a single quote. If the total repair cost exceeds the economic threshold, we will advise honestly and recommend alternatives.