monitor arm keeps tilting down

Mount-It! Car Laptop Mount for Commercial and Personal Use Vehicles, Heavy-Duty No Drill Notebook Vehicle Stand for Trucks, Vans and SUVs

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

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

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

Planar Wall Mount Extended Arm

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

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! 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

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 Workstation for Single Monitor and Keyboard | Height Adjustable Standing Desk Mount with Monitor Mount and Keyboard Tray

Ergotron Mounting Arm for Monitor White 45686290

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

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

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

Fellowes 8043701 Professional Series Freestanding Dual Horizontal Monitor Mount

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

Fellowes® Office Suites™ Premium Monitor Riser in Black

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

Mount-It! Anti-Theft Tablet Kiosk Full Motion Wall Mount Compatible with iPad 10, 9, 8, iPad Pro 10.5, iPad Air 10.5 | Locking Kiosk for iPad | White

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

Amer Mounts AMR1UW Mounting Arm for Curved/Flat Screen Display

Ergotron Mounting Extension Polished Aluminum

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