HP Pavilion 27xi 27-inch Diagonal IPS LED Backlit Monitor bottme of srcrrn going dark

[Ramseybella]

I'm wanting to know what may cause my HP Pavilion 27xi 27-inch Diagonal IPS LED Backlit Monitor to have a couple dark blotches growing from the bottom of my screen?

They go away after i turn it on and off a dozen times.

Are the LED's going bad or the main board needs to be replaced?

I can't seem to find parts for this monitor or any information on trouble shooting and referbishing.

Thank you.

Pete

[Sneha_01]

Hi @Ramseybella 

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

It sounds like you're dealing with an issue where dark blotches appear on your HP Pavilion 27xi screen, and they seem to go away after repeatedly turning the monitor on and off. This could indeed point to a couple of potential causes related to the monitor's backlighting or internal components. Here are a few possibilities:

1. Backlight Issues

Since this is an IPS LED-backlit monitor, one likely cause could be problems with the LED backlighting system itself. The LEDs can sometimes malfunction, especially if one or more are starting to fail. The dark blotches could be the result of uneven backlight distribution or failing LEDs that don’t properly illuminate the screen in certain areas.

Symptoms to watch for:

• The blotches are persistent but may fade or move around with power cycling.
• The screen remains partially dark after you turn it on.
• Uneven brightness when the screen is showing a white or bright background.

2. Faulty Inverter or Power Supply

The inverter or power supply circuitry that drives the backlight could be malfunctioning. If this component is partially failing, it may struggle to provide enough power to the LEDs, especially when the monitor first powers up. This could explain the need to turn the monitor off and on multiple times to clear the issue.

Symptoms to watch for:

• The issue is more pronounced when first powering on the monitor.
• The blotches disappear after the monitor warms up.

3. Display Panel Issues (Fading or Pressure Points)

IPS panels, while generally more durable, can still suffer from issues like fading or discoloration due to pressure points, age, or damage. However, this is less likely to cause blotches that disappear after restarting the monitor.

Symptoms to watch for:

• The blotches are more localized and might correlate with specific physical damage (e.g., a dent or pressure from the back of the screen).
• The blotches do not change after cycling the power.

4. Loose or Damaged Cables

A loose or damaged ribbon cable connecting the display to the mainboard could cause flickering or dark spots. This can sometimes be resolved by adjusting the cable or ensuring it’s seated properly.

Symptoms to watch for:

• The dark blotches are intermittent, and moving the monitor or touching certain areas of the frame changes the pattern.

5. Mainboard or GPU Issues

A problem with the monitor's internal processing (mainboard) or external GPU (if using a computer connected to the monitor) could also cause display anomalies. This is less likely if you only see the issue on this specific monitor and it behaves normally with other monitors.

Symptoms to watch for:

• The problem appears on multiple devices or when the monitor is connected to a different input (e.g., HDMI vs DisplayPort).

I hope this helps.

Take care and have a good day.

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Rachel571

HP Support