monitor arm keeps tilting down

Ergotron 60-271-009 Slatwall Bracket - Black

Rocstor ErgoReach Y10N008-B1 Desk Mount for Monitor Black Vertical

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

Manhattan 461542 Clamp Mount for up to 32" Monitor - 17.64lb Capacity - Black

SIIG Triple Monitor Desk Stand for 13" to 27" Displays

Amer Networks Dual Stand For Up To 32in

Amer AMR2S32 Dual Monitor Stand for 32" Displays

Atdec Dual Stack Heavy 49" Monitor Desk Mount AWMS2LTH75HB

Rocstor ErgoReach EP3 Dual Monitor Pole Mount, C-Clamp & Grommet, Black

SIIG Articulated Freestanding Dual Monitor Stand w/ 27" Screen Support - Black

Peerless PLCM-UNL-CP Solid-Point Flat Panel Straight Column Ceiling Mount -225lb

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

Peerless-AV® SmartMount Flat Wall Mount for 22" to 43" Displays

StarTech Monitor Mount for Two Displays - Up to 24" Screen Support

Ergotron DS100 Sliding Display Bracket for 30" Displays

StarTech ARMDUOSS Up to 24" Adjustable Dual-Monitor Stand

Ergotron Desk Mount for Monitor Display TV Matte Black

Amer Mounts AMR2AWS Wall Mount for Monitor Keyboard Mouse

Ergotron Neo-Flex All-In-One Lift Stand

SIIG Easy-Adjust Dual Monitor Desk Stand for 13" to 27" Displays

Premier Mounts P5080F Universal Flat Mount

Peerless-AV SmartMount Pull-Out Pivot Wall Mount for 49" to 65" Displays

Premier Mounts P4263FP Low-Profile Flat Portrait Mount for Panels up to 175 lb.

Atdec Telehook Display Drop Length Adjustable Ceiling TV Mount, 143lbs Support