Does this work with my Siemens SINUMERIK control?

Yes. The LCD upgrade accepts the same video signal as the original Siemens CRT and mounts in the same cutout. Compatible with SINUMERIK 810/820/840D. No software or parameter changes needed.

How long does installation take?

10-15 minutes. Power off the machine, unplug the old CRT, connect the new LCD module, secure with screws. No soldering required.

Do I need to rewire or change cables?

No. Plug-and-play with no rewiring — the LCD uses the same DB-25 interface as the original Siemens CRT display.

Image quality vs original CRT?

800x600 resolution, 350-450 cd/m² brightness, 50,000+ hr lifespan. Sharper image, no flicker, no high-voltage hazards.

What warranty and support?

2-Year warranty, lifetime technical support, worldwide shipping from Shenzhen factory.

Volume discounts available for 5+ units. Contact info@cncdisplay.com for a bulk quote.

Siemens

Siemens 8.4" Industrial CRT to LCD | SINUMERIK Monitor Replacement

Name: Siemens 8.4-inch Industrial CRT to LCD | SINUMERIK | Kongto
Brand: Kongto Technology
SKU: KONGTO-SIEM84-LCD
Price: 349 USD
Availability: InStock

Siemens 8.4-inch industrial CRT to LCD replacement for SINUMERIK controls. Plug-and-play, no rewiring. 2-year warranty, ships today.

View Specs & Guide

$349 USD ✔️ In Stock — 2-Year Warranty

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Siemens 8.4-inch Industrial CRT to LCD replacement panel - front view

Siemens 8.4-inch Industrial CRT to LCD replacement panel - back view

Specifications

Spec	Original CRT	Kongto LCD
Technology	8.4-inch Industrial CRT	8.4-inch TFT-LCD Industrial Panel
Resolution	640x480	800x600
Brightness	~200 cd/m2	350-450 cd/m2
Lifespan	~15,000 hrs	50,000+ hrs
Power	DC 24V	DC 24V (original)
Interface	DB-25	DB-25 (direct compatible)
Safety	High voltage (10-15kV)	Low voltage DC
Weight	—	1.5 kg

Compatible Systems

Siemens SINUMERIK 810 / 820
Siemens SINUMERIK 840D
All Siemens controls using 8.4-inch CRT displays

Common CRT Failure Symptoms

Blank screen / no power — Flyback transformer failure, most common in aging CRTs
Dim or unreadable display — CRT phosphor wear after 15,000+ hours of operation
Flickering or image distortion — Capacitor degradation in sync circuits
No image / raster only — Video amplifier or electron gun failure
Intermittent display — Loose internal connections or cold solder joints

Our LCD module eliminates all CRT-related failure modes permanently. Higher brightness, lower power, no high voltage.

Frequently Asked Questions

Does this work with my Siemens control?

Do I need to rewire anything?

Installation time and difficulty?

Warranty and support?

What Our Customers Say

"CRT was too dim to read. LCD arrived fast, installed in 15 minutes. Crystal clear display."

— John D., USA (June 2026)

"Perfect plug-and-play. No modifications needed. Works great on our SINUMERIK 840D."

— Hans M., Munich, Germany (May 2026)

"After 20 years our CRT finally died. This LCD brought our machining center back to life."

— Akira T., Osaka, Japan (June 2026)

Warranty & Service

2-Year Warranty — Lifetime Technical Support — Worldwide Shipping
Factory direct from Shenzhen, China. Ships within 24 hours.
Email: [email protected] | WhatsApp: +86-13686889647
No CNC parameter changes needed — Plug and play, your machine programs and settings stay intact.

Ready to replace your CRT?

$349 — In Stock — Ships within 24 hours