Samsung Qn90b Firmware 1710 Hot

The QN90B uses mini-LED backlight with thousands of zones. Firmware 1710 may have changed zone switching frequency or peak current limits, increasing heat from the LED driver boards.

A curious side-effect of running hot: blooming becomes visible around bright objects in dark scenes. This suggests heat is affecting the response time of the Mini-LED driver ICs, causing them to bleed light.

Following the release of firmware version 1710 for the Samsung QN90B (2022 Neo QLED 4K TV), a subset of users across forums (Reddit, AVSForum, Samsung Community) reported that their TV runs noticeably hotter than with previous firmware versions (e.g., 160x, 150x). The heat is often described as radiating from the back panel, particularly near the top-center and One Connect Box connection area (on models with external box). Some users reported thermal shutdowns, though not widespread. Samsung has not officially acknowledged a heat-related issue in release notes. samsung qn90b firmware 1710 hot

| Method | Effectiveness | Risk | |--------|--------------|------| | Factory reset | Low–Moderate | None | | Disable Intelligent Mode & Voice Wake-up | Moderate (reduces CPU load) | None | | Reduce Backlight in SDR (to 20-25 instead of 30-35) | High (lower heat) | Reduced brightness | | Use external streaming stick (reduce internal CPU) | Moderate | None | | External USB fan behind TV | High (but noisy) | Warranty void if modified | | Downgrade via service menu (not confirmed working on 1710) | Unknown | High (brick risk) |

Note: No reliable downgrade path exists for 1710 due to Samsung’s anti-rollback (e-fuse). The QN90B uses mini-LED backlight with thousands of zones

However, the update has not been without criticism. The phrase "hot" in regard to this firmware also stems from users "hot under the collar" about motion handling.

Several users have reported that after updating to 1710, the Motion Smoothing (Auto Motion Plus) settings appear to behave differently. Even for those who meticulously turn off smoothing to preserve the cinematic "film look," the update seems to have altered the underlying motion interpolation or judder reduction. Note: No reliable downgrade path exists for 1710

Reports include:

Here is the bad news: As of March 2025, Samsung implemented a security bootloader lock (eFuse) starting with firmware 1650. Once you upgrade to 1710, you cannot downgrade to 160x or earlier via USB. Attempting to do so will display “Update files not found” or “Invalid version.”

The only “downgrade” possible is:

Recommendation: Do not attempt brute-force downgrades. You will brick your QN90B.