E1-510 NO display

[String2016]

I need help on this Acer E1-510 la-a621p, the problem is turns on but no display.I have already replaced the bios chip and flash the bios with the one here in this forum, but still no display, cpu is warm.I flashed the main bios only, because when i try to flash ec using svod3 it says pins false, but i check the pins with connectivity is ok.i have 0.9v on the coil near cpu.voltages on the coil have 3.3v and 5v near the ram area.anyone please

[digitalpc]

Re: E1-510 NO display

first check ram votlage should be 1.35v or 1.5v

[String2016]

Re: E1-510 NO display

on the pin on the ram slot it has 1.35v

[piernov]

Re: E1-510 NO display

Make sure you're using known good DDR3L.
No backlight/no image even on external? Pressing caps lock key doesn't trigger caps lock LED? Not POSTing at all?

[String2016]

Re: E1-510 NO display

already tried replacing with good ram ddr3l still persist, blue light pressing and fan spinnnig but no caps lock light, no image on both internal and external

[mcplslg123]

Re: E1-510 NO display

PJ504/506/601,PH801/802 Voltage??PU801 PIN 2/21/15 voltage?? 1.35V present on Pin30 of Dramslot??

[String2016]

Re: E1-510 NO display

PJ504=1.35V
PJ506=0.6V
PJ601=1.04V
PU801 PIN2 3.3V
PIN15=3.3V
PIN21= 5V
DRAMRST= 0.2V

I cannot find PH801/802 on the board

[mcplslg123]

Re: E1-510 NO display

DRAMRST should be 1.3V. Measure voltage on all pins of pu501 and post here.

[String2016]

Re: E1-510 NO display

pu501

pin1=0v
pin2=0v
pin3=0v
pin4=0v
pin5=1.35v
pin6=0v
pin7=3.1v
pin8=3.2v
pin9= 0.9v
pin10=1.3v
pin11=5v
pin12=5.1v
pin13=5v
pin14=0v
pin15=0v
pn16=1.3v
pin17=1.3v
pin18=4.9v
pin19=1.3v
pin20=0.6v

[String2016]

Re: E1-510 NO display

I think the missing voltage is the LGATE supposed to have 1.35v and its connected to pin4 of PQ503, i measured pin 4 missing 1.35 v

[piernov]

Re: E1-510 NO display

Try other BIOS dumps.
Note that with dirty ME/TXE, it may take a minute for display to turn on.

[String2016]

Re: E1-510 NO display

@piernov i have downloaded the bios here is this forum as many confirmed it is working for this model and board , already replaced the chip. the problem is still no display

[String2016]

Re: E1-510 NO display

anyone can help on this please

[String2016]

Re: E1-510 NO display

anyone can help on this please the LGATE is missing on pin19

[mcplslg123]

Re: E1-510 NO display

Your measurement of PU501 seems little confusing. If you have 0.6V at pin20 you should have 0.6V at pin2 as well.Pin4 REF voltage is missing.PIN6 FB is 0V which is wrong. Without ref and fb working, your fet gate will not open. If you have a same spare ic try replacing it.

[String2016]

Re: E1-510 NO display

i double checked again the measurement yes pin 20=0.6v pin2=0.6v and pin 4 as well. i cannot find the same chip is there any replacement value on this?

[String2016]

Re: E1-510 NO display

can i replace it with 51716 chip?

[mcplslg123]

Re: E1-510 NO display

Replace with Richtek code J7=

[String2016]

Re: E1-510 NO display

i replaced the chip with marking J7 and PQ502 became shorted

[mcplslg123]

Re: E1-510 NO display

RT8207MZQW=J7

So your J7 ic is likely bad. Was it new or you pulled from scrap mb??