monitor arm keeps tilting down

Platinum Series Dual Monitor Arm For Monitors Up to 27" Black 8042501

Planar Dual Monitor Desk Clamp - Supports Up to 27"

Amer AMR2C32 Clamp Mount for up to 32" Displays

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

Premier Mounts AM100 Low Profile Swingout Mount for Flat-Panels up to 100lb.

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

Mount-It! Quad Monitor Desk Mount for 4K, 3D, LCD or LED, 13 Inch - 24 Inch Screen Sizes, Gas Spring Arm Design, 80 Lbs. Capacity, Silver

StarTech STNDMTV70 TV Cart with One-Touch Height Adjustment for 32" to 75" TVs

Mount-It! Height Adjustable Full Motion Two Monitor Computer Desk Mount Spring Arm Quick Release with Grommet Base - Silver

Mount-It! Dual Monitor Desk Mount Swivel Arm, Quick Connect with Combo Grommet and Clamp Base, Black

Mount-It! Height Adjustable Spring Arm Dual-Segmented Single Monitor Mount | Fits Up to 30" | Black

Mount-It! Dual Monitor Wall Mount with Articulating Gas-Spring Arms, VESA 75 x 75 mm and 100 x 100 mm, 19.8 Lbs. Weight Capacity, Silver

Mount-It! Expandable Two Monitor Computer Desk Mount Spring Arm Quick Release | 13" to 27" Screens

Premier Mounts Rotating Mount for Flat Panels RFM

Mount-It! Dual Monitor Desk Mount with Full Motion Swivel Arms | Premium Aluminum Material with Modular Quick Connect Function

Mount-It! Triple Monitor Desk for Multiple User, Three Monitor Swivel Arm Desk Mount Fits 20 22 24 25 26 27 Inches Screens, VESA 75 and 100 Compatible

StarTech Dual Monitor Mount w/ Built-In 2-Port USB and Audio Pass-Through

Amer Mounts AMR4S32 Stand-Style Quad Mount - 24" to 32" Displays

Amer Networks QUAD MOUNT SUPPORTS 4 X 24 QUAD MOUNT MAXIMUM OF 24IN

Amer AMR2AW Dual Articulating Display Wall Mount

Amer AMR3S32 3-Panel Monitor Stand - 26" to 32" Monitors

Amer AMR2AC Articulating Dual Monitor Mount - 15" to 27" Monitors

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

Amer Networks AMR1AWSV3 Wall Mount for Keyboard CPU Mouse Flat Panel Display