HP laptop has random black-screen freezes, 90B fan error after shutdowns, and now won't turn on or charge
I'm having several serious problems with my HP laptop, and I'm trying to figure out whether they're related. The laptop is currently completely dead, so I'm especially concerned about the underlying hardware.
Laptop specs:
HP laptop
AMD Ryzen 5 7000HS-series CPU
Radeon integrated graphics
8 GB DDR5 RAM
512 GB SSD
Windows 11
- Random black-screen freezes
The laptop occasionally becomes completely unresponsive and the screen goes black.
This can happen both while the laptop is idle and while I'm actively using it. It isn't consistently triggered by inactivity.
When it happens:
Screen goes completely black.
Power-button LED remains on.
Keyboard backlight may remain on initially.
Moving the mouse/touchpad does nothing.
Win + Ctrl + Shift + B doesn't bring the display back.
Closing and reopening the lid doesn't help.
Eventually, the keyboard becomes unresponsive as well.
Caps Lock doesn't respond.
The only way to recover is holding the power button for around 10–15 seconds to force it off.
So it seems like the entire system is freezing, rather than just the display turning off.
- 90B fan error after unexpected shutdowns
The laptop has also shown the HP 90B fan error, but there is something unusual about when it appears.
It happens after an unexpected shutdown.
The sequence is generally:
Unexpected shutdown → turn laptop back on → 90B fan warning appears → laptop needs to cool down completely → after cooling, the warning disappears and the laptop starts normally.
The fan itself appears to be working.
I've also:
Opened and cleaned the fan.
Run HP's Fan Speed Test — Passed.
Run HP's Fan Thermal Test — Passed.
So I'm confused about why I'm getting the 90B warning when the fan appears to work and passes HP's diagnostics.
- Most serious issue: laptop is now completely dead
Yesterday, I was playing a video with 13 Brave tabs open. The laptop was working normally for around 16–17 minutes, and then it suddenly powered itself off.
After that, I couldn't turn it back on.
I tried the usual recovery methods, including holding the power button for around 15 seconds, but nothing worked.
More importantly, it isn't charging either.
When I plug in the charger, the small charging indicator on the side of the laptop doesn't light up at all.
There is no response — it basically behaves as if the laptop is completely dead.
What could be causing this?
I'm wondering if these problems could be connected somehow:
random system freezes → unexpected shutdowns → 90B warning → now complete no-power/no-charging condition.
Could this be a problem with the motherboard, charging/power circuit, battery, thermal protection, BIOS/firmware, fan sensor, RAM, or something else?
The fact that the laptop now has zero charging indication is particularly concerning to me.
I'd really appreciate advice from anyone familiar with HP laptops or who has experienced similar symptoms. I'd especially like to know what I can safely test to determine whether this is a motherboard/power issue before taking it to a repair shop.