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‎06-30-2025 05:21 AM

HP Recommended
Product: HP ProBook 455 15.6 inch G9 Notebook PC IDS Base Model
Operating System: Microsoft Windows 11

We’ve got over 100 HP ProBook 455 G9 laptops at work, and we recently upgraded their RAM from 8GB to 16GB. We installed the new memory without any hiccups over the past few weeks. But then, last Friday, things took a turn after a Windows Quality update that included a BIOS firmware upgrade. Out of nowhere, several of these upgraded laptops just stopped working!

Here’s what’s happening: when they try to install updates, they ask for a restart, then show a black screen saying the BIOS firmware is being updated. After a few minutes, everything goes black, and the system won’t boot back up. The fan starts making a loud noise, the keyboard lights are flashing, but that’s it—silence!

We’ve tried all the usual fixes to get into the BIOS, but nothing worked. As a test, we removed the new RAM, and right after that, the system came back and finished the BIOS upgrade. But here’s the kicker: it won’t accept the new memory anymore!

The laptops that didn’t get the BIOS update are running fine with the new memory. They’re on BIOS version HP V78 Ver. 01.16.01 (from August 12, 2024).

The RAM we bought is the "Crucial 8GB DDR4-3200 SODIMM - CT8G4SFRA32A," and the troublesome BIOS version is HP U78 Ver. 01.19.00 (from April 11, 2025).

Any thoughts on what could be going on?

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