monitor arm keeps tilting down

Mount-It! 2 Tier Desk Organizer Riser | Computer Monitor Stand with Keyboard Storage Shelf for Desktops, Laptops, Printers, Home Office Space Saver

Mount-It! Ultra Wide Monitor Mount and TV Desk Mount | Heavy-Duty Height and Tilt Adjustable Monitor Stand for Screens up to 42"

Mount-It! Full Motion Articulating Heavy Duty Dual Monitor Desk Mount w/ USB 3.0 Ports Fit 17-35 in, 33 Lbs. Capacity Per Arm w/ Adjustable Gas Spring

Mount-It! Monitor Mount and Laptop Tray with USB Powered Cooling Fan, for 13 Inch - 27 Inch LCD Screens, Silver

Mount-It! Premium Car Headrest Tablet Holder with Adjustable Arm | Heavy Duty Carbon Fiber Car Tablet Mount for iPad, Galaxy, & Fire Tablets

Mount-It! Laptop Desk Stand Mount | Articulating Vented Laptop Tray Mount | Adjustable Laptop Arm Mount | Single Laptop Desk Extension w/ C-Clamp

Mount-It! Triple Monitor Stand, 3 Monitor Stand Fits 19 - 27 Inch Computer Screens, Free Standing Base, Three Heavy Duty Full Motion Adjustable Arms

Mount-It! Counterbalance Laptop Arm for Wall and Pole Mounting

Mount-It! Height Adjustable Full-Motion Swiveling Arm Mount for 15" Laptops and 27" Monitors, Gray & Black

SideTrak Swivel 12.5" Attachable Portable Monitor for Laptop - IPS Full HD 1920x1080 USB Display

Targus Universal Monitor Stand

Mount-It! TV Wall Mount, Universal Fit for 13 - 30 in. TVs & Computer Monitors | Full Motion Tilt & Swivel 14 in. Extension Arm | Black

Mount-It! Tilting Wall Mount TV for 30 - 55 in. Flat Screens, LED, LCD, and Plasma TVs, 77 Lbs. Capacity, 2" Low Profile Design, Max VESA 400 x 400

Mount-It! No Stud TV Wall Mount | Low-Profile Tilting Hanger Mount for No-Damage No Drill Dry Wall Installation | 110 Lbs. Weight Capacity | Black

Mount-It! Articulating Full Motion Rotating, Tilting, Swiveling Adjustable Height For TV, Plasma, and Computer Monitor Desk Mount with Grommet Clamp

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! Computer Monitor Mount with Height Adjustable and Tilting Functionality, For 13" - 32" Screen Sizes, C-Clamp Installation, Silver

Mount-It! TV Wall Mount Bracket with Full Motion Arm Fits 13 - 43 Flat Screen TVs VESA 75, 100, 200, 55 Lbs. Weight Capacity with 15" Extension

Mount-It! Single Articulating, Full Motion, Tilting, Wall Mount For 13 - 32 Inches, Samsung, Sony, Asus, Dell, LG, Sharp, Insignia, ViewSonic - Silver

Mount-It! Single Articulating, Full Motion, Tilting, Wall Mount For 13 - 32 Inches, Samsung, Sony, Asus, Dell, LG, Sharp, Insignia, ViewSonic - Black

Mount-It! Slim Tilting TV Wall Mount Bracket for 32-65 Inch Samsung, Sony, Vizio, LG, Sharp TVs with Low Profile Design up to VESA 600x400mm, Black

Mount-It! Ergonomic Foot Rest Under Desk | Adjustable Tilt Footrest w/ Textured Massage Surface | Work Footstool Under Office Desk Foot Support, Black

SideTrak Swivel Pro Triple Touch | Touchscreen Ultra Slim Attachable Portable Monitor for Laptops

Mount-It! TV Mounting Hardware Kit, Universal VESA Wall Mount Screw, Washer, Spacer Pack (M4 M5 M6 M8) For TV and Monitor Mounting