Dell UltraSharp U2720Q: problems, parts and running costs

Checked: 2026-10-27

Summary

The U2720Q is a 27-inch 4K IPS monitor with 90 W USB-C, wide color and full ergonomics, but USB-C video can fail while charging continues, and the 60 Hz panel has no variable refresh. Electricity is roughly $13.20 per year in the illustrative 33 W scenario, with no consumables. At $120 to $160 delivered a tested used unit is a good buy; above $250 to $300 the new Dell S2725QC at $329.99 is usually preferable.

Common problems and fixes

USB-C video drops while charging continues — recurring owner reports from May 2020 through February 2025 describe charging that works while the video signal dies, with HDMI still working. Try a known-good full-featured cable, a second host, correct input selection and a power cycle; if HDMI works but USB-C video fails across hosts and cables, seek Dell service while the Service Tag shows active warranty. [7][13][14][15]
USB-C flicker or intermittent blanks, often with Macs — September to October 2020 reports describe repeated black and reconnect cycles; one reply said a cable swap stopped it. Test cable, host port, OSD USB-C prioritization and charging load separately before blaming the monitor. [16][17][18]
Complete power loss after 20 to 30 minutes on USB-C — a July 2020 report said the monitor switched off entirely until AC was unplugged and replugged, and switching to HDMI without USB-C charging stopped it. Isolate and assess professionally; no confirmed root cause was found. [19]
Occasional color shifts, ghosting and flicker in older units — a July 2025 owner with two U2720Q units reported sporadic tint changes and ghosting that sometimes persisted with the source disconnected; a March 2026 commenter said a replacement did not end similar symptoms. Run built-in self-diagnostics with the source disconnected and compare cold and warm behavior. [12]
Entry-level HDR and 60 Hz limits — DisplayHDR 400 has no local dimming, contrast is ordinary IPS, and there is no Adaptive Sync or variable refresh; these are design limits, not defects. [3]
Dead pixels, backlight bleed, scratches and a loosened USB-C socket on used units — inspect ports and coating and display full-screen white, black and color test images before buying; Dell’s bright-pixel policy applies only for the duration of an active qualifying warranty. [1][20]

Parts and consumables

AC power cord — a third-party PGENDAR cable sold as U2720Q compatible was listed at $12.98; the compatibility claim comes from the seller, not Dell OEM validation. Replace only if damaged or missing. [1][27]
LCD panel, backlight, power board and USB-C input board — Dell handles whole-monitor support and exchange; no retail spare part numbers or repair costs were found. [1][14][15]

Yearly running cost

Manufacturer reference is 33 W typical active, under 0.3 W standby and 200 W maximum only with maximum backlight plus USB and peripheral loads. Illustrative annual electricity, excluding laptop charging: 33 W times 8 hours per day over 250 workdays is 66 kWh per year, or about $13.20 per year at $0.20 per kWh; standby at 0.3 W for 16 hours per day over 365 days is 1.75 kWh, or about $0.35. These are illustrative, not metered. There is no maker-required annual consumable. If an out-of-warranty unit develops USB-C board or panel damage, repair economics may be unfavorable against observed used replacements in the $150 to $300 range, but no quoted diagnostic or labor amount was found. [1][5][9][14]

When it is a good buy

Price thresholds at other stores: eBay used without a stand at $149.99 with free shipping; $250.00 plus $47.98 delivery; $255.00 plus $67.38 delivery; a completed August 2026 with-stand sale at $129.99 plus $49.99 shipping; Newegg third-party new or renewed listings at $649; Iconic Micro refurbished at $449.99 but sold out; new Dell S2725QC at $329.99; ASUS ProArt PA279CRV at $419.99 at B&H Photo, with a $429 ASUS reference price. Value guidance: $120 to $160 delivered for a thoroughly tested unit with correct stand, clean panel and working USB-C video plus charging is a good used buy when high refresh is not needed; $160 to $220 is conditional on proof of USB-C function, return rights and good cosmetic state; above $250 to $300 the new Dell S2725QC at $329.99 with 120 Hz and a current warranty is usually preferable unless 90 W power delivery and a physical DisplayPort socket are required; above $350 to $400 the ASUS ProArt PA279CRV at $419.99 is a clearer creator-market choice. Alternatives: Dell S2725QC (new, 120 Hz, 65 W USB-C, $329.99); ASUS ProArt PA279CRV (new, 96 W USB-C, $419.99); a tested used U2720Q or U2720QM at a low enough price. [3][8][9][22][23][24][25][26]