%PDF-1.4 %âãÏÓ 1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj 2 0 obj << /Type /Pages /Count 2 /Kids [5 0 R 7 0 R] >> endobj 3 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica >> endobj 4 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold >> endobj 5 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595.28 841.89] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents 6 0 R >> endobj 6 0 obj << /Length 5307 >> stream BT /F2 21 Tf 0.06 0.08 0.12 rg 1 0 0 1 46 789.89 Tm (Why Does My Monitor Say 'No DP Signal from Your) Tj ET BT /F2 21 Tf 0.06 0.08 0.12 rg 1 0 0 1 46 763.89 Tm (Device' All of a Sudden?) Tj ET BT /F2 11 Tf 0.72 0.14 0.18 rg 1 0 0 1 46 727.89 Tm (TechRounder Help Center PDF) Tj ET BT /F1 9.5 Tf 0.36 0.39 0.46 rg 1 0 0 1 46 711.89 Tm (Live article:) Tj ET BT /F1 9.5 Tf 0.36 0.39 0.46 rg 1 0 0 1 46 699.39 Tm (https://www.techrounder.com/help/why-does-my-monitor-say-no-dp-signal-from-your-device-all-of-a-sudden/) Tj ET q 0.82 0.85 0.9 RG 1 w 46 680.89 m 549.28 680.89 l S Q BT /F1 10 Tf 0.24 0.27 0.32 rg 1 0 0 1 46 668.89 Tm (By Vipin PG | Published August 20, 2026 | Updated August 20, 2026 | Topic: Solution | 3 min read) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 647.89 Tm (If this was working fine an hour ago and now you're staring at that message, it's rarely the monitor) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 632.89 Tm (dying out of nowhere. Something changed in between, a driver update, a Windows patch, the PC went to) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 617.89 Tm (sleep and didn't wake the display properly, or the cable got bumped when you moved something on the) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 602.89 Tm (desk. Work through these in order. The first two fix it for most people.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 574.89 Tm (Reseat the DisplayPort Cable) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 552.89 Tm (Sounds too simple to matter, but DP connectors are notorious for looking fully plugged in when they're) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 537.89 Tm (not quite seated. Rule this out first.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 515.89 Tm (1. Shut down the PC and turn off the monitor completely.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 499.09 Tm (2. Unplug the DP cable from both ends.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 482.29 Tm (3. Check the connector for bent pins or dust, then plug it back in until you feel the latch click.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 465.49 Tm (4. Power the monitor on first, then the PC.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 442.69 Tm (Confirm the Monitor Is Actually Set to DisplayPort) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 420.69 Tm (Some monitors don't auto-switch inputs, especially if you've also got an HDMI cable plugged into the) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 405.69 Tm (same screen. Press the physical input/source button on the monitor \(usually near the power button\) and) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 390.69 Tm (manually select DisplayPort, or DP1/DP2 if there's more than one.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 362.69 Tm (Roll Back or Reinstall the Graphics Driver) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 340.69 Tm (If this started right after a Windows Update or a fresh GPU driver install, the driver is the prime) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 325.69 Tm (suspect, not the hardware.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 303.69 Tm (1. Right-click the Start button and open Device Manager .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 286.89 Tm (2. Expand Display adapters , right-click your GPU, and choose Properties .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 270.09 Tm (3. Go to the Driver tab. If Roll Back Driver is available, use it.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 253.29 Tm (4. If it's grayed out, uninstall the driver \(tick "delete the driver software" if prompted\), restart, and let) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 239.49 Tm (Windows reinstall a clean copy, or grab the latest version from NVIDIA, AMD, or Intel directly.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 216.69 Tm (Only Happens After Sleep? This One's Different) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 194.69 Tm (DisplayPort doesn't wake up the same way HDMI does. HDMI keeps sending a signal the monitor can) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 179.69 Tm (pick up right away; DP depends on a proper handshake between the GPU and the monitor's hot-plug) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 164.69 Tm (detect line, and that handshake sometimes fails to restart cleanly when Windows wakes. It's a) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 149.69 Tm (well-known quirk of the standard, not something specifically broken in your setup.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 127.69 Tm (- Try switching the monitor off and back on with its own power button after waking the PC, this forces DP) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 113.89 Tm (to re-handshake.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 97.09 Tm (- Turn off Fast Startup : Control Panel -> Power Options -> Choose what the power buttons do -> uncheck) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 83.29 Tm ("Turn on fast startup.") Tj ET q 0.86 0.88 0.92 RG 1 w 46 42 m 549.28 42 l S Q BT /F1 8.4 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 30 Tm (TechRounder Help Center | Page 1 of 2) Tj ET BT /F1 7.2 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 19 Tm (https://www.techrounder.com/pdf/help/why-does-my-monitor-say-no-dp-signal-from-your-device-all-of-a-sudden.pdf) Tj ET endstream endobj 7 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595.28 841.89] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents 8 0 R >> endobj 8 0 obj << /Length 3822 >> stream BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 789.89 Tm (- In Control Panel -> Power Options -> Change plan settings -> Change advanced power settings, find PCI) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 776.09 Tm (Express -> Link State Power Management and set it to Off .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 759.29 Tm (- On Nvidia cards, switch the power management mode to "Prefer maximum performance" in the Nvidia) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 745.49 Tm (Control Panel instead of "Optimal power", the power-saving state is often what's dropping the link.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 722.69 Tm (Swap the Cable and Try a Different Port) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 700.69 Tm (DP cables fail more often than people expect, especially cheap or overly long ones. Try a different) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 685.69 Tm (DisplayPort cable if you have one, and test another DP port on the GPU if there's more than one.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 657.69 Tm (Using a Dock, Hub, or KVM Switch? Bypass It) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 635.69 Tm (Docking stations and multi-monitor hubs are a common point of failure people overlook, because) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 620.69 Tm (everything else on the dock, USB, charging, ethernet, still works fine. Plug the monitor directly into the) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 605.69 Tm (GPU or laptop's DP output. If that fixes it, the dock is the problem, not your PC or monitor.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 577.69 Tm (Desktop PC? Reseat the GPU) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 555.69 Tm (If the PC was recently moved, cleaned, or had a side panel off, the GPU can shift slightly in its PCIe) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 540.69 Tm (slot without fully disconnecting, enough to keep the system running but drop the DisplayPort signal) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 525.69 Tm (specifically. Power down, unplug the PC, remove the GPU, and reseat it firmly until it clicks into the slot) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 510.69 Tm (and the retention clip locks.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 482.69 Tm (Check for a Monitor Firmware Update) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 460.69 Tm (A handful of monitor brands, Dell in particular, have shipped firmware updates specifically to fix DP) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 445.69 Tm (handshake and signal-detection bugs. Check the manufacturer's support page for your exact model) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 430.69 Tm (number under drivers/downloads. Installing it usually needs a USB cable connected from the monitor) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 415.69 Tm (to your PC during the update.) Tj ET BT /F1 10.5 Tf 0.28 0.31 0.36 rg 1 0 0 1 56 391.69 Tm (Quote: If you've been through all of the above and the error still shows up on the same cable and port, but) Tj ET BT /F1 10.5 Tf 0.28 0.31 0.36 rg 1 0 0 1 56 377.69 Tm (a different monitor works fine on that exact cable and port, the DisplayPort output on your GPU, or the) Tj ET BT /F1 10.5 Tf 0.28 0.31 0.36 rg 1 0 0 1 56 363.69 Tm (monitor's DP input, is likely failing. Test the cable and monitor separately on another device before) Tj ET BT /F1 10.5 Tf 0.28 0.31 0.36 rg 1 0 0 1 56 349.69 Tm (deciding anything needs replacing.) Tj ET q 0.86 0.88 0.92 RG 1 w 46 42 m 549.28 42 l S Q BT /F1 8.4 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 30 Tm (TechRounder Help Center | Page 2 of 2) Tj ET BT /F1 7.2 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 19 Tm (https://www.techrounder.com/pdf/help/why-does-my-monitor-say-no-dp-signal-from-your-device-all-of-a-sudden.pdf) Tj ET endstream endobj xref 0 9 0000000000 65535 f 0000000015 00000 n 0000000064 00000 n 0000000127 00000 n 0000000197 00000 n 0000000272 00000 n 0000000414 00000 n 0000005772 00000 n 0000005914 00000 n trailer << /Size 9 /Root 1 0 R >> startxref 9787 %%EOF