I know that Lenovo has released an Android app to decode thinkpad DTMF Beep codes.
But my ThinkPad T470 gives 4 beeps during first boot (non-DTMF), then it rebotts automatically and gives 2 Beeps (non-DTMF). Then nothing more happens.
These beeps are not recognised by the App because they are not DTMF.
If I remove i.e. all the RAM and retry, then it goes on (after the above) and gives a correct DTMF.
Does anyone have a link or a description of the non-DTMF beep codes?
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