The system will run fine with a working 65W adapter. If you can try the existing adapter on another Dell and it's not recognized there, either - the adapter is the problem. Alternatively, try a new Dell adapter on this system - if that solves the problem, you're set. If not, on this model, the DC jack is soldered to the mainboard - you'll need to replace the mainboard to solve the problem.
Thanks for your reply. I just checked and it says "AC Adapter = Unknown device installed". How come? It has been replaced once but it's an original AC adapter from Dell. I see now that it's only 65W. Shouldn't it be 90W? I got this from the Dell support when the first one broke (still had warranty back then).
ejn63
9 Legend
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87.5K Posts
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February 24th, 2015 02:00
The system will run fine with a working 65W adapter. If you can try the existing adapter on another Dell and it's not recognized there, either - the adapter is the problem. Alternatively, try a new Dell adapter on this system - if that solves the problem, you're set. If not, on this model, the DC jack is soldered to the mainboard - you'll need to replace the mainboard to solve the problem.
ejn63
9 Legend
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87.5K Posts
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February 23rd, 2015 14:00
Is the AC adapter correctly recognized (F2 at powerup to check)? If it shows "unknown", the system will not run at full power.
stefan_edberg
3 Posts
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February 24th, 2015 00:00
Thanks for your reply. I just checked and it says "AC Adapter = Unknown device installed". How come? It has been replaced once but it's an original AC adapter from Dell. I see now that it's only 65W. Shouldn't it be 90W? I got this from the Dell support when the first one broke (still had warranty back then).
stefan_edberg
3 Posts
0
February 24th, 2015 04:00
So this means either the AC Adapter or my mainboard is broken. Not worth fixing. Thanks for the help!