step 1 What you will need
You will need a special screw driver. it looks like a Phillips head, but it only has 3 branches instead
of 4. it is sometimes referred as a Tri-wing or trigram screwdriver.
step 2 Take the screws off
Remove the LENOVO IdeaPad Y450 battery from the laptop Remove the 2 tri-wing screws using the special screwdriver I mentions before.
step 3 Remove the cover
The cover is slightly glued on and has some snaps. Pull on it lightly without braking any of them.
step 4 Remove the board
the control board can be partly remove. no need to take it our completely
step 5 Locating the fuse
The fuse is located on the right bottom of the board in this picture. If you have a volt meter, set it
on continuity and see if the fuse is blown. If the fuse is actualy blown, un solder it, and replace for
a new one.
step 6 Put the LENOVO IdeaPad Y550 Series Battery back together
Once the fuse is replaced, you can test it by pressing the test button on the bottom of the battery
pack. Of course, if your battery is totally dead. The LED will not turn on. In that case you will have
to charge it a bit after reassembling it. Put back the battery in reverse order.
step 7 Final Test
If the battery had a blown up fuse, it was impossible to charge the battery. Once the battery is
reinserted into the laptop, it should be charging again. leave it on charge for a few hours then remove
it and press the test button. If you get LED coming on, it's fixed.