3500U laptop 0.4 Ghz when on battery

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biostud

Lifer
Feb 27, 2003
19,801
6,895
136
Using DuckDuckgo instead of Google lead me to this site


And using the "UMAF not always stock at 0,4Ghz solution" seems to have fixed it :)
 

netman9111

Junior Member
Aug 11, 2025
1
1
36
I had the exact same problem, I replaced the battery and ac power adapter. That fixed the problem. Pretty sure it was the ac adapter, the battery was shot so I replaced both. It wasn't supplying the proper charge, even though it showed the correct voltage on a multimeter, it still wasn't giving the system what it needed so it clocked the CPU down so bad it was pretty much unusable. IT literally would not run over 400mhz.
 
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