PS5 CMOS issue fixed by latest system software update

When PS5 system software update version: 02.21-04.03.00 arrived a few weeks ago, all we were told was that it would “improve system performance”. It looks like there has been a pretty big change in this update though. According to YouTuber Hikikomori media, the update fixed the CMOS issue that prevented PS5 console owners from playing digital games if the internal clock battery died, at least for the most part.

The CMOS issue started when gamers discovered that if a PlayStation 4 console’s internal clock battery failed, it prevented them from playing digital and disc games offline. The issue was caused by the way the trophy system was configured to prevent players from hacking their unlocks. As long as gamers could log into the PlayStation Network, that wouldn’t be a problem, but if Sony ever shut down the PS4’s servers, the console would eventually stop playing the games altogether. It was later discovered that the issue also affected the PlayStation 3 and PlayStation 5 consoles to a lesser extent, mainly due to backward compatibility issues.

Sony had promised that they were working on a solution to the issue, and while the issue was resolved in September on PS4, Hikikomori Media confirms that the issue is now also resolved on PS5, for the most part. All PlayStation 5 and PlayStation 4 games that gamers have on disc will now install and play without a problem, even if their PS5 console’s battery is dead. All digital PS5 and PS4 games will work on the PS5 as well, except those that were not backward compatible initially. However, PlayStation Plus games won’t run on a console with a dead battery, which is understandable enough given that the console has to verify Plus membership first. You can see the video in full below:

Sony has yet to say if this is the primary focus of the update, but if we hear anything official, we’ll be sure to let you know. The CMOS issue was resolved for PlayStation 4 consoles in September.