Lenovo G560 LA-5752p NO Power No Light

[torla]

HI,

Lenovo G560 LA-5752p rev1 2009-11-30

NO Power No Light any solution

[polytek]

Re: Lenovo G560 LA-5752p NO Power No Light

remove battery and memory module, try to power with other dc adaptor,
if no result, take out the mobo check if there is 3/5volt
this is the schematic diagram:

[Djosla]

Re: Lenovo G560 LA-5752p NO Power No Light

and you should try bios reprogram after checking for main system power...

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

where to check 3/5 volt on bios or ...where?

[Ramee]

Re: Lenovo G560 LA-5752p NO Power No Light

where to check 3/5 volt on bios or ...where?

On page 39 of the schematic

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

I checked, no volts on BIOS

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

On page 39 of the schematic

ON page 39 v5 v3 v1.5 is ok..

[polytek]

Re: Lenovo G560 LA-5752p NO Power No Light

backup your old bios and try to flash with this dump:

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

did not help with flashin bios

[polytek]

Re: Lenovo G560 LA-5752p NO Power No Light

if 3 and 5 volt alwon are present , then bios must be supplied with 3.3VALW
you say, no volt on the bios how ?
try flashing EC bios U3 with this file:

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

if 3 and 5 volt alwon are present , then bios must be supplied with 3.3VALW
you say, no volt on the bios how ?
try flashing EC bios U3 with this file:

not help flash
pj10 3,3 V
pj12 5,1 V

[whaldsz]

Re: Lenovo G560 LA-5752p NO Power No Light

what do you get at pin 7 of PU2? You should get 5v there. if not, replace the chip.

[torla]

Re: Lenovo G560 LA-5752p NO Power No Light

Thx for help pu2 is Ok.

[whaldsz]

Re: Lenovo G560 LA-5752p NO Power No Light

voltage at pin 1 PU4A?

[polytek]

Re: Lenovo G560 LA-5752p NO Power No Light

if LID_sw# is low laptop can not power on
check this:

[Ramee]

Re: Lenovo G560 LA-5752p NO Power No Light

I checked, no volts on BIOS

Hi, did you fix it?

Remove the bios ic and check the pads if you are getting 3v, if yes, replace the bios ic.

[ghass]

Re: Lenovo G560 LA-5752p NO Power No Light

try to replace isl6251 ic

[mehtabbukhari]

Re: Lenovo G560 LA-5752p NO Power No Light

Hi,

I Have similar board with different problem.

After pressing the power button Power ON LED comes on and shuts down.

After checking the M/B found that SUSP# is not coming from EC. I have already Tried flashing the EC.

Any idea...

[palady]

Re: Lenovo G560 LA-5752p NO Power No Light

Also SUSP# = 0.Programing EC didn't help. CMOS battery reset solve the issue.

[mcplslg123]

Re: Lenovo G560 LA-5752p NO Power No Light

Hi,

I Have similar board with different problem.

After pressing the power button Power ON LED comes on and shuts down.

After checking the M/B found that SUSP# is not coming from EC. I have already Tried flashing the EC.

Any idea...

Facing exactly this issue on the very same mobo. Anybody knows the solution??

PS: cmos reset didnt helped. Bios(Main+EC) flashed but didnt helped. Powers up for 3 seconds and shuts down. No 3V VS or 5V VS. Alw present. +3v/5v VS line is not shorted though. SUSP# on pin 116 of kbc is missing.