monitor arm keeps tilting down

Peerless-AV SmartMount Articulating Wall Mount for 22" to 43" Displays SA740P

Planar Adjustable Dual 24"-30" Monitor Stand Black 997650402

StarTech Single Swivel Wall-Mount Monitor Arm for 13" to 34" Monitors

Planar Wall Mount Extended Arm

Mount-It! Quad Monitor Desk Mount With Full Motion Height Adjustable Arms | Premium Modular Computer Screen Mount | Clamp Base | Silver

Mount-It! Dual Monitor Mount | Double Monitor Desk Stand | Fits 2 Computer Screens 13 - 27 in. | C-Clamp & Grommet Base | Heavy Duty Full Motion Arms

Mount-It! Heavy Duty Dual Monitor Arm up to 35 in. 44 Lbs. Screens, RGB Lights, VESA Desk Mount for Two Widescreen Curved Monitors 27 32 34 35 Inches

Mount-It! Height Adjustable Dual Monitor Arm Mount Desk Stand Fits Two 24 to 32 Inch with C-Clamp, Grommet and 2 x 3.0 USB Ports, VESA 75 100 Screens

Monoprice 3-Way Adjustable Tilting Desk Mount Bracket - Black For 13 - 30 Inch Monitors | Up to 33 Pounds

Ergotron Mounting Arm for Monitor White 45686290

Mount-It! Sit Stand Workstation for Single Monitor and Keyboard | Height Adjustable Standing Desk Mount with Monitor Mount and Keyboard Tray

Ergotron DS100 Dual-Monitor Desk Stand

Mount-It! Height Adjustable Converting Triple Monitor Electric Standing Desk Converter | Stand-Up Computer Workstation with Three Monitor Mount

Mount-It! Height Adjustable Full Motion Wall Mount Workstation with Single Monitor Mount, Keyboard Tray and CPU Holder Fits 32 Inch Computer Screens

Mount-It! Sit Stand Wall Mount Workstation | Adjustable Height Stand Up Computer Station with Articulating Monitor Mount, Keyboard Tray, & CPU Holder

Mount-It! Full Motion Single Monitor Desk Mount, Height Adjustable with Gas Spring Arm

Mount-It! Full-Motion Triple Monitor Desk Mount, Holds up to 14.8 Lbs. - Silver

Amer Mounts AMR2AWS Wall Mount for Monitor Keyboard Mouse

Mount-It! Single Height-Adjustable, Articulating, Pivoting, Swiveling, Tilting, Arm Desk Mount for LCD, LED, Computer Monitor Displays, Silver

Ergotron 45-684-290 LX Pro Desk Mount Dual Monitor Direct Arm, White

Mount-It! Full Motion Adjustable Height Vehicle Laptop Mount for Cars, Trucks & Vans | No-Drill Installation and Tray for Laptops Up to 17"

StarTech Desktop Display Stand with Height Adjustable Monitor Mount

Full Motion Single Monitor Wall Mount with Gas Spring Arm, Fits Monitors Up To 32", Silver

Mount-It! Dual Monitor Desk Mount | Pole Mounted Gas Spring Dual Monitor Arm | Premium Height Adjustable Computer Display Riser Fits Up to 32", Silver