Inspiron 7720

[bushie]

Hello. i have this problem with the laptop,it makes 8 equal in sound beeps. i reballed the video chip, changed the proc(i7) ,ram's.made the display test with D+power button(is ok).Do you have a schematic for this or some sugestions?! Thanks.

[innocentforeign]

Re: Inspiron 7720

8 Beeps on start up means the LCD on system has failed
unplug the VGA cable and check external display if still same then you should try to re flash bios

[dj_ricoh]

Re: Inspiron 7720

Usualy with 8 beeps its shows signal on external.
Try to connect a external display when you power up.

[bushie]

Re: Inspiron 7720

I tried on external with no succes.i dont find a good bios to reprogram it.

[dspok]

Re: Inspiron 7720

@bushie
No need to reprogram chip.
There should be problem in Video Chip, LVDS Cable or LCD.

[bushie]

Re: Inspiron 7720

i guess it remains the video chip( display and lvds i think are ok because of the the colour test)...dunno what to say.weird to crash like that ..the laptop was opened for a minor intervention on a the headset jack,and a clean up ,and didnt start after.

[bushie]

Re: Inspiron 7720

Any other ideas?I would really appreciate a schematic if you guys have one. Thanks.

[spidey]

Re: Inspiron 7720

change LCD dsiplay

[bushie]

Re: Inspiron 7720

I have done it with some other led display and it lighted the backlight (didnt seen anything else but that is because it was some other model of display,used it just for light test) so i guess that the lvds ,inverter is ok.