asus tp412fa black screen

[tikanot]

hello i have an asus tp412fa with power on but screen stay black.

[mon2]

Re: asus tp412fa black screen

Does this laptop work with an external monitor? (if it is supported)

[tikanot]

Re: asus tp412fa black screen

same thing. Power on power off button work , charging led work too. But screen stay black with light on it at power on

[Techtiger]

Re: asus tp412fa black screen

If Steps to clear CMOS have done then test they supply of all Gray inductor probably 9 of them in this mob note down the voltage and post it with a pic of the Mod , test the DRAMRESET in Ram slot , was the bios flash ?

[tikanot]

Re: asus tp412fa black screen

Yes the bios is flash. Before mother board power on. It s does nothing because one gray inductor is l'ost after solder one with a donor. It s power on and charge but black screen

[Techtiger]

Re: asus tp412fa black screen

Can you confirm all inductor’s are out putting the voltages ? And what about the voltage DRAMRST most probably in 30 of the room slot ?

[tikanot]

Re: asus tp412fa black screen

Ram is solder on this mb. I have only 3v and 5v no other voltage

[Techtiger]

Re: asus tp412fa black screen

Ram is solder on this mb. I have only 3v and 5v no other voltage

request the bordviewer on the Schematic (https://www.badcaps.net/forum/forumdisplay.php?f=41)

is the Fan spinning when press the power BTWN ? this Mob has on bordram & a ram SLOT ? measure Resistance all inductors & post it with pic , what is the SIO & 3/5V regulate number XXXXXX , measure voltage on the BIOS ic & post

[tikanot]

Re: asus tp412fa black screen

the fan is not spinning, yes they are 2.5v on bios chip

[Techtiger]

Re: asus tp412fa black screen

the fan is not spinning, yes they are 2.5v on bios chip

for the bios IC the voltage is less than what i expected, you did not reply for the post #9 correctly dig more if you want to learn

[tikanot]

Re: asus tp412fa black screen

yes the mob have bordram and ramslot. You think not enough power in bios chip?

[tikanot]

Re: asus tp412fa black screen

i find resistance not solder near the bios chip it's not this the mistake? when i desolder bios chip i desolder resistance near it.