ASUS K50IJ with lp156wh2 no backlight in led

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

Here are photos of mainboard. one of each side of area with dc jack.
Best regards Nalle

[sorinac]

Re: ASUS K50IJ with lp156wh2 no backlight in led

measure this diode and check if it is shorted
if shows 0 ohm then is faulty and you need to change it
also the computer should work without it but you must be careful next time

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

measure this diode and check if it is shorted
if shows 0 ohm then is faulty and you need to change it
also the computer should work without it but you must be careful next time

The diode shows 58,1 when multimeter is set to measure max 200K.
And that is from both sides? when I measure black on one side and red on other. and same thing if you switch sides on probes.??? should only go one way, right???

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

You must take diode from the board and test it with diode test. You shoud have reading i one way and not in the other way.

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

You must take diode from the board and test it with diode test. You shoud have reading i one way and not in the other way.

Ok. But does it sound like the diod is the problem? It is not shorted then? What is next thing to check? Do you think I should take out diod from bord?

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

not necessarily, take it off the board and test with diode test on your multimeter

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

not necessarily, take it off the board and test with diode test on your multimeter

Hello. I have been busy this weekend but now I took the diod of the board and did a measure. It shows no reading in any way. You wrote earlier that it should work without it. But if it have no reading I understand the diod is broken, but shouldn't it work. Or do you mean it should work but not charge. What is the correct diod to buy? There is someone selling electronic parts in my town. What do I need?

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

i think this is the diode you need

http://www.ebay.com/itm/SS0540-SMT-M...item5aea91b1e0

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

Hello again. I have changed the diod, but the laptop does not charge anyway. What is next thing?
Regards nalle077

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

Hello again. I have changed the diod, but the laptop does not charge anyway. What is next thing?
Regards nalle077

Hello. Anyone with an idea?

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

check coil L8101 for 5V L8102 for 3V

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

check coil L8101 for 5V L8102 for 3V

I can not find them. Can you please help me with the location?
Best regards nalle077

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

it can be on other side of board, U8101 can be on one side and this coil on other. Check carefuly

this is how it look

Or post a good quality photo of MB in both side

[nalle077]

Re: ASUS K50IJ with lp156wh2 no backlight in led

it can be on other side of board, U8101 can be on one side and this coil on other. Check carefuly

this is how it look

Or post a good quality photo of MB in both side

I have found them I think, but do not know which of them you mean.
Here are pictures.
First overview and then closeup

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

one of this is L8001 and L8002, look for printed text near this coil

[rtstorm]

Re: ASUS K50IJ with lp156wh2 no backlight in led

or you could find this QFN IC, and check for voltages pin 16 and pin 25