No lights, no power, ac adaptor works
1.Ensure your battery is holding power. Some laptops will auto shut-off if the battery won't hold a charge. In that case, replace your battery and retry. Check your charging lights or indicators to see if your laptop is getting power and charging.
2.Check your AC to DC converter (the little black adapter you plug in your AC outlet.) This converts AC power into DC power. Is it abnormally hot? If so, it is probably burned out. Replace it. Note- high heat is not a true indicator of malfunctioning. It can be dead and cold as well. No power
indicators on your laptop could be a sign of a dead or bad converter also. Converters WILL get hot (this is normal.) If it is REAL hot (to touch), then this is not good.
3.Check your power cord. Are there nicks or cuts? If so, unplugg it from the AC power and repair with electrical tape- better yet, replace it. Many computer salvage stores carry power adapter cords. They're cheap.
4. Check your laptop lid switch. If it is broken, you may have power but your screen may not come on.
This is usually a little button or mechanism located close to the lid hinge that turns on or off your
screen when your lid is open or closed respectively. Normally the operator does not push this button.
These are fragile and broken easily on some laptop models. Sometimes these can be fixed, more often
they will require replacements. If you aren't an expert repair person, get a technician to
repair/replace it for you. Opening up laptops is a very delicate operation and much more difficult to
repair than desktops. It may be worth it to spend the money for repair.
5. If you have tried these easy solutions and it still won't power on, then your problem lies
elswhere. You may have an internal power switch or voltage regulator problem.. Internal problems will
require professional help.
SOURCE: I have a Dell Studio laptop. Will power on with
This should have a "battery check" button on the battery itself. Remove the battery and press the button. If it reveals that the battery is not fully charged, or you cannot get it to take full charge, perhaps all that you need is a new battery. If the battery is failing the check the system makes on it at boot, it won't.
Dead (ish) Laptop.
Press the power button momentarily to check if it is hibernating or in stand by. If this doesn't work;
Try firstly removing the laptop's
battery as it may be at a critical voltage and the system will not
start because of it. Plug in your ac adaptor and monitor what
happens. Does the power light illuminate? If it does it should then
boot up, if it doesn't, try a known good ac adaptor before going any
further.
If the adaptor is fine and the laptop still won't start,
then you may have a mother board fault and should contact a
dealer/repairer for further advice.
Hope this helps.
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