monitor arm keeps tilting down

Mount-It! Articulating Computer/TV Monitor Wall Mount for Screens 30 Inches or less, Built-in Quick Release Action for VESA 75x75 & 100x100

Amer Mounts Hydra HYDRA3XL Flat or Curved Display Clamp Desk Mount White/Black

StarTech PC Wall Mount Bracket For Desktop Computers 2NSCPUWALLMOUNT

Mount-It! Single Monitor Desk Mount with Full Motion Arm | VESA 75 and 100 mm Compatible Computer Screen Bracket with Grommet Base, Silver

Amer Mounts AMR1UW Mounting Arm for Curved/Flat Screen Display

Alogic Glide Mounting Arm for Dual 32" Monitor White C32GMA2

Premier Mounts Low-Profile Dual Stud Dual Arm Swing AM95

Amer AMR3S Triple Monitor Mount with Desk Stand - 15" to 24" Monitors

SIIG Premium Aluminum Freestanding Triple Monitor Desk Stand CE-MT2111-S1

Amer Mounts Based Hex Monitor Mount for four 15"-24" Flat Panel Screens - Black

Peerless-AV® Universal I-Shaped Adaptors for 32" to 90" Displays

The Joy Factory MagConnect MMU117 Surface Mount for Tablet PC iPad Black

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

Heckler AV Cart for Single 50"-75" Display Black/Gray H700-BG

StarTech Desktop Display Stand with Height Adjustable Monitor Mount

Mount-It! Heavy-Duty Ultrawide Monitor Arm up to 49" / 44 Lbs. for Samsung Odyssey G9, 75x75 & 100x100 VESA Desk Mount for Widescreen Curved Monitors

Mount-It! Single Monitor Desk Mount With Gas Spring Arm | Clamp Base | Modular Design For Future Expansion | Premium Aluminum Cast

Amer AMR2C32V Dual Monitor Clamp Vertical Mount - Max 32" Monitors

StarTech Desk-Mount Full Motion Articulating Monitor Arm

Amer AMR2S32 Dual Monitor Stand for 32" Displays

Amer Mounts Dual Monitor Vertical Stand Mount - Max. 32" Monitors