Introduction to TP900 Comfort Troubleshooting
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- Jun 19,2025

Introduction to TP900 Comfort Troubleshooting
The Siemens TP900 Comfort (6AV2124-0JC01-0AX0) is a high-performance Human Machine Interface (HMI) panel renowned for its 9-inch widescreen TFT display, resistive touchscreen, and robust connectivity via PROFINET and PROFIBUS DP. While reliable, users may face issues like black screens, slow performance, or touch unresponsiveness. This guide provides expert troubleshooting steps, backed by Vicpas, a trusted supplier of Siemens HMI replacement parts with over 20 years of global service.
Common TP900 Comfort Issues and Fixes
1. Black Screen or Failure to Start
Problem: The TP900 Comfort screen remains black or fails to boot into Windows CE 6.0, as noted in Siemens support documentation.
Solutions:
- Verify Power Supply: Ensure a stable 24V DC supply with secure connections. Loose or faulty power cables can prevent startup.
- Perform a Reset: Power off the unit, disconnect for 10 minutes, then restart to clear temporary glitches.
- Check Hardware: A faulty LCD may require replacement. Vicpas offers TP900 Comfort LCD displays with a 365-day warranty.
- Update Firmware: Use WinCC (TIA Portal) V11 or higher to install the latest firmware.

2. Slow Performance or Screen Glitches
Problem: Users report sluggish response or graphical bugs on the TP900 Comfort, impacting productivity.
Solutions:
- Clear Memory: Access the panel’s settings to clear the 12 MB configuration memory, as per the Siemens TP900 Comfort manual.
- Optimize WinCC Project: Ensure the project matches the TP900’s 800x480 resolution and 16 million color display.
- Recalibrate Touchscreen: Use the control panel to recalibrate the resistive touchscreen.
- Replace Protective Film: A worn film can cause touch issues. Vicpas provides TP900 Comfort protective films.
3. Unresponsive Touchscreen
Problem: The TP900 Comfort touchscreen fails to register inputs, often due to wear on the resistive sensor.
Solutions:
- Clean the Screen: Use a soft, lint-free cloth with a mild cleaner to remove dust or debris.
- Replace Touch Panel: If unresponsive, replace with a Vicpas touch panel.
- Test Inputs: The TP900 supports glove operation, so test with different input methods.

4. PLC Communication Failures
Problem: The TP900 Comfort fails to connect with PLCs over PROFINET or PROFIBUS DP.
Solutions:
- Check Network Settings: Verify the PROFIBUS address (up to 126) and transmission rate (e.g., 1.5 Mbps).
- Inspect Cables: Replace damaged cables with Vicpas TP900 Comfort cables.
- Update Drivers: Install the latest PROFINET/PROFIBUS drivers via WinCC (TIA Portal).
Why Trust Vicpas for TP900 Comfort Solutions?
At Vicpas, we specialize in Siemens HMI replacement parts, serving over 10,000 customers across 68 countries. With over 20 years of experience and ISO9001:2015-certified manufacturing, we deliver high-quality touch panels, LCDs, protective films, and cables for the TP900 Comfort. Our global supply chain ensures 95% of orders ship within 48 hours, backed by a 365-day warranty.

Our TP900 Comfort Offerings:
- Touch Panels
- Plastic Case Covers
- Protective Films
- LCD Displays
- Mounting Clips, Gaskets, and Cables
Related Simatic TP900 Comfort Part No. :
Siemens TP900 Comfort | Description | Inventory status |
6AG1124-0JC01-4AX0 | SIPLUS HMI TP900 COMFORT | In Stock |
6AV2144-8JC10-0AA0 | SIMATIC HMI TP900 COMFORT INOX | In Stock |
6AV2124-0JC01-0AX0 | SIMATIC HMI TP900 COMFORT | Available Now |
6AV2144-8JC20-0AA0 | SIMATIC HMI TP900 Comfort INOX | Available Now |
SIMATIC HMI TP900 Comfort | Description | Inventory status |
Preventive Maintenance Tips
To maximize the lifespan of your TP900 Comfort (LED backlight up to 80,000 hours), follow these tips:
- Clean Regularly: Use approved cleaners to prevent dust buildup on the touchscreen.
- Update Firmware: Keep firmware current via WinCC (TIA Portal).
- Use Protective Films: Install Vicpas protective films to shield the touchscreen.
- Control Environment: Operate within 0–50°C to protect components.
Frequently Asked Questions (FAQs)
What software programs the TP900 Comfort?
WinCC (TIA Portal) in four editions configures the TP900 Comfort.
Where can I find the TP900 Comfort manual?
Download it for free from VICPAS.
Can Vicpas repair my TP900 Comfort?
We provide replacement parts for repairs. Contact us for assistance.
Get Expert TP900 Comfort Support from Vicpas
Facing TP900 Comfort issues? Trust Vicpas for high-quality parts and expert solutions. With a 50,000-unit inventory and global service, we’re your go-to partner for Siemens HMI maintenance.
Contact Vicpas Support Explore TP900 Comfort Parts
Published by Vicpas, your trusted Siemens HMI parts supplier since 2005.