monitor arm keeps tilting down

Ergotron Mounting Arm for Flat Panel Monitor Notebook 32" Screen Support

Ergotron 45-437-026 MX Mini Wall Mounting Arm for 24" Monitor, Polished Aluminum

Ergotron 45-549-026 LX Dual Stacking Arm Tall Pole Desk Monitor Mount

Mount-It! Full Motion Extended Corner Long Arm TV Wall Mount, 40" Extra Long Reach Extension Fits Flat Panel TVs Up to 400x400 VESA, 110 Lbs Capacity

Ergotron 200 Wall Mount Pivot

Mount-It! VESA Mount Adapter Plate | Monitor & TV Mount Extender Conversion Kit | Fit Up to 400x200 mm Patterns, Heavy-Gauge Steel | Hardware Included

Mount-It! Full Motion Ceiling TV Mount Bracket | Fits 32 - 70 Inch Flat Panel TVs | Adjustable Height Telescoping Tilt and Swivel | 110 Lbs. Capacity

Single Monitor Arm Desk Mount Black Computer Monitor Arm Mount with 2 USB Ports Uncaged Ergonomics

SIIG Mounting Arm for Monitor - 32" Screen Support - Black

Ergotech Freedom Arm for PC FDMPCS01

Mount-It! Full Motion Articulating TV Wall Mount Bracket for 32 70 Plasma, LED, LCD Flat Screens up to 100 Pounds | Tilt, Swivel, Extend, Compress

Mount-It! TV Wall Mount Full Motion, Center and Corner Installation, Tilt, Extend, Articulating TV Wall Bracket Fits up to 65 Inch TVs, Black

StarTech Articulating Arms Height Adjustable up to 32" Dual Monitor Stand

SIIG CE-MT2M12-S1 Mounting Arm for 32" Monitor - Black

Mount-It! Dual TV Ceiling Mount Rotating & Tilting Double TV Ceiling Mount For Samsung, Sony, LG, Toshiba, Sharp, Element | For 32 - 75 Inch Screens

Vantage Point LCD Tilt Wall Mount - AX2WL02-S (Silver)

SIIG Mounting Arm for Monitor - 32in Screen Support - Black

Ergotron 45-245-026 LX Dual Side-by-Side Mounting Arm

Mount-It! VESA Mount Adapter Kit | TV Wall Mount Bracket Adapter Converts | Fits Most 23 Inch to 42 Inch TVs and Monitors | Hardware Included | Black

Mount-It! Extra Long Ceiling TV Mount Bracket, 10 Feet Long, Fits 40 - 70 Inch Flat Panel Televisions, Adjustable Height Telescoping Tilt and Swivel

Mount-It! Aluminum Monitor Stand For iMac - Metal Monitor Stand Desktop Organizer w/ Keyboard Storage - Universal Monitor Riser For PC & Laptop

Ergotron LX Desk Mount LCD Monitor Arm for 32" Monitors (White)

Ergotron Mounting Arm for Monitor TV White 45476216

Mount-It! Universal VESA Pole Mount | Full Motion TV Pole Mount Bracket | VESA 75 100 | Fits TVs or Monitors Up to 32 Inches