sony vaio pcg-51211l

[String2016]

Hi friends, i need help on this sony vaio laptop there is a display on external but on the internal there is no backlight, when i checked on lvds connector someone remove a fuse i dont know what fuse it is, I have attached the image and here is the measurements of the lvds and i dont have schematic
pin1=3.3v
pin2=3.3v
pin12=3.3
pin13=3.3
pin16=1.2
pin27=1.7
pin29=1.7
pin35=1.7
pin40=3.3

the rest pins have 0v

anyone can help me on this please

[SMDFlea]

Re: sony vaio pcg-51211l

Schematic https://www.badcaps.net/forum/showthread.php?t=46618

[String2016]

Re: sony vaio pcg-51211l

Thanks for the response sorry my mistakes above here is the correct measurements
pin1=3.3v
pin2=3.3v
pin12=3.3
pin13=3.3
pin16=1.2
pin27=1.7
pin29=3.3
pin30=3.3

is there a way to bypass F17 FUSE because other side have 19v and on LCDVCC on pin 29 and pin 30 it has only 3.3v and pin 30 connected to C296 caps no 19v also please help

[String2016]

Re: sony vaio pcg-51211l

need help on this please

[SMDFlea]

Re: sony vaio pcg-51211l

The fuse part number is 0466003.NRHF ,its in the schematic, its a 3A very fast blow. Do you have any donor motherboards

[SMDFlea]

Re: sony vaio pcg-51211l

Check R252 and C298 , on pin 11 DISPON

[String2016]

Re: sony vaio pcg-51211l

i have scrapboards but i cannot find the same fuse and i checked R252 has 5.5kohms and c298 0v and pin 11 0v

[mcplslg123]

Re: sony vaio pcg-51211l

Thanks for the response sorry my mistakes above here is the correct measurements
pin1=3.3v
pin2=3.3v
pin12=3.3
pin13=3.3
pin16=1.2
pin27=1.7
pin29=3.3
pin30=3.3

is there a way to bypass F17 FUSE because other side have 19v and on LCDVCC on pin 29 and pin 30 it has only 3.3v and pin 30 connected to C296 caps no 19v also please help

When the fuse is blown. how can there be 19v on lvds connector??
19v will go thruogh the fuse only. Check resistance on both pins of fuse, if not shorted , you can put a jumper between both pins of fuse. This is for test purpose only. It is safer to put a fuse but atleast you can check by putting jumper.

[SMDFlea]

Re: sony vaio pcg-51211l

As mcplslg123 said, you can use a jumper, or even use a higher rated fuse temporarily. If you still get nothing on the display check U11 .

[String2016]

Re: sony vaio pcg-51211l

there is no 19v on lvds connector. i checked resistance to the ground on one side 0L and on the other side 0.552v.I already tried putting wire on both sides of the fuse to test but still the same issue

[SMDFlea]

Re: sony vaio pcg-51211l

Thanks for the response sorry my mistakes above here is the correct measurements
pin1=3.3v
pin2=3.3v
pin12=3.3
pin13=3.3
pin16=1.2
pin27=1.7
pin29=3.3
pin30=3.3

is there a way to bypass F17 FUSE because other side have 19v and on LCDVCC on pin 29 and pin 30 it has only 3.3v and pin 30 connected to C296 caps no 19v also please help

pin 29 and 30 are ok. You should only put the jumper between pin 1 and 2 of f17 (VIN) . The lvds needs 19v on pins 8,9,10 only.

[String2016]

Re: sony vaio pcg-51211l

i already done that i put jumper from the fuse pin 1 and 2 but still the same issue and no 19v on lvds connector pin 8910

[SMDFlea]

Re: sony vaio pcg-51211l

Thanks for the response sorry my mistakes above here is the correct measurements
pin1=3.3v
pin2=3.3v
pin12=3.3
pin13=3.3
pin16=1.2
pin27=1.7
pin29=3.3
pin30=3.3

is there a way to bypass F17 FUSE because other side have 19v and on LCDVCC on pin 29 and pin 30 it has only 3.3v and pin 30 connected to C296 caps no 19v also please help

"because other side have 19v" .The other side of what have 19V , i assume you meant 19V on pin 2 of F17 before you put the jumper on ?

[String2016]

Re: sony vaio pcg-51211l

yes pin2 of F17 have 19v i put jumper on both sides of F17

[SMDFlea]

Re: sony vaio pcg-51211l

Ok ,so you have 19V on pin 2 before you put the jumper ACROSS from pin 2 to pin 1 of F17 pads. If you have 0V with the jumper then pins 8,9,10 or C292 is shorted