RESQ-MYTECH
New member
Morning guys.
Logic board 820-3435-B. no image. screen illuminates. no chime ( may be turned off). Logic board is immaculate.... to immaculate TBH.
Tested so far:-
Pins 18/19 J8300 PP3V3_S0SW_LCD_UF =0.00v
L8304 Pins 1/2 =0.00v
R5670 not fitted
U8300 pin 1 EDP_PANEL_PWR= 0.00v
pin 2/3 PP3V3_S5 =3.334v
pin 4/5 PP3V3_S0SW_LCD_R =0.001v
pin 6 GND =OK
J8300 pin 14 DP_INT_HPD_CONN =0.00v
pin 24 DP_INT_ML_P<0> =0.001v
pin 24 DP_INT_ML_N<0> =0.00v
Seeing as the screen is illuminating I have not tested pins 3/4 on J8300
Now, I am assuming that EDP_PANEL_PWR needs to be present to activate U8300 but reading the shematic ( probably incorrectly) this leads back to pin 765 on the CPU. using Landrex I do not see anywhere that I can test for EDP_PANEL_PWR. Also.... might be me and it being an early morning, I have done a search on the forum for 820-3435 no image even down to a straight 820-3435 search and apart for a post that has Duke on it where it is surmized that the CPU is dead, I have found nothing with reference to this issue on this board.
Has anyone got any pointers or is it in fact a "gonna"?
Many thanks in advance.
Logic board 820-3435-B. no image. screen illuminates. no chime ( may be turned off). Logic board is immaculate.... to immaculate TBH.
Tested so far:-
Pins 18/19 J8300 PP3V3_S0SW_LCD_UF =0.00v
L8304 Pins 1/2 =0.00v
R5670 not fitted
U8300 pin 1 EDP_PANEL_PWR= 0.00v
pin 2/3 PP3V3_S5 =3.334v
pin 4/5 PP3V3_S0SW_LCD_R =0.001v
pin 6 GND =OK
J8300 pin 14 DP_INT_HPD_CONN =0.00v
pin 24 DP_INT_ML_P<0> =0.001v
pin 24 DP_INT_ML_N<0> =0.00v
Seeing as the screen is illuminating I have not tested pins 3/4 on J8300
Now, I am assuming that EDP_PANEL_PWR needs to be present to activate U8300 but reading the shematic ( probably incorrectly) this leads back to pin 765 on the CPU. using Landrex I do not see anywhere that I can test for EDP_PANEL_PWR. Also.... might be me and it being an early morning, I have done a search on the forum for 820-3435 no image even down to a straight 820-3435 search and apart for a post that has Duke on it where it is surmized that the CPU is dead, I have found nothing with reference to this issue on this board.
Has anyone got any pointers or is it in fact a "gonna"?
Many thanks in advance.