Hanns.G model HG281D. Information here may also apply to model HG281DPB

Size: 28" | Native Resolution: 1920 x 1200 (16:10) WUXGA | Panel: Active Matrix, TFT LCD | Viewing Angle: 160° (H) / 160° (V) | Pixel Pitch: 0.309mm | Display Colors: 16.7 Million | Brightness: 500 cd/m2 | Contrast Ratio: 800:1 | Response Time: 3 ms | Connectors: D-Sub, HDMI, 3.5mm Stereo In, 3.5mm Stereo Out, AC In | Power Supply: 100VAC - 240VAC, 50/60Hz Autodetect | Power Consumption: 100W Max | EPA Energy Star Compliant | 2.5W x 2 Channel Built-In Stereo Speakers | HDCP Support | Dimensions (H x W x D): 26.4"x 19.2" x 8.4" | Weight: 24 lbs.| Release Date: July 27, 2007

Problem Solution
Display will intermittently flicker or completely lose picture and backlighting for seconds or minutes at a time. Eventually, display may not work at all, or will require a complete cool-down before functioning again. Power light on unit will often continue to illuminate while the picture remains dark. Most often, the cause is failed DC filter capacitors for the 3.3V and the 1.8V voltage regulators on the main logic board[1]. They are labeled as C80 and C83 and are rated for 100μF @ 16V, 105°C. Since these are the most common components to fail on these units, consider replacement with the best-quality capacitors available when performing any other board repair, especially if DC voltage readings are out of spec or inconsistent.
  1. Special thanks to user budm at badcaps.net https://www.badcaps.net/forum/showthread.php?t=21741