Re: Acer A517-51 LA-E891P LAN+wireless adapter not working
I haven't reflow the components yet, but I checked caps values on board.
The wireless adapter issue is related with the LAN chip?
Do you think the problem is the PCH itself? reflow?
...
freeboxman
Member
Last Activity: 11-14-2024, 03:09 PM
Joined: 03-09-2015
Location: Lyon
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Re: Acer A517-51 LA-E891P LAN+wireless adapter not working
The laptop working fine with my SSD except LAN and wireless adapter not detected in operating system....Leave a comment:
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Re: Acer A517-51 LA-E891P LAN+wireless adapter not working
Hello Mon2,
The power adapter isn't the original one 45W, but the same amperage recommended by acer 2.37A(label on the bottom of product).
Without the SSd M.2, i've screen with acer logo and not bootable device.
The LAN chip stays cold( i think) because the board is a little bit warm when the cpu is working on. i've also boot with linux live on my usb stick. but same issue lan not detected.
if necessary, i've a bench power supply to check.Leave a comment:
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Re: Acer A517-51 LA-E891P LAN+wireless adapter not working
Hello,
+regout= 1.02V
I don't know what happens, but I remember that since I tried to insert the usb key the pc has stopped working.
I forgot to specify that I changed the M.2 ssd, because the first was also shorted. I replaced it.
the LAn IC was changed by a new one bought from aliexpress. the orientation has been respected and the ground also, because most of the voltages are present except the power supply of the sd card and the VDD33 / 18 (please correct me if I'm wrong)....Leave a comment:
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Acer A517-51 LA-E891P LAN+wireless adapter not working
Hello guys,
I've some issues with my laptop Acer A517-51. LA-E891P r1A
initially,I tried to insert by mistake a usb key in the RJ45 port. The realtek RTL8411b ic got very hot. the SDD m.2 was no working. I replaced the LAN controller. Now the ssd working fine, but the LAN, SD card and wireless adapter no showing in device manager. LAN is activated in bios and i treid with another wireless adapter but same issues.
I measured the voltages on the IC controller RTL8411b. Voltages missing in pins 27 and 13.
in your opinion, other things to... -
Re: SAMSUNG scala3 cpu core missing
Hello,
the problem is solved. and the laptop working fine.
it was the Bios battery. however, I checked the voltage when I started my tests, I had 2.95V.
today, i changed the battery with a new one, and now i have 1.05V in cpu core voltage.
thank you all for your help.Leave a comment:
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Re: SAMSUNG scala3 cpu core missing
Hello Guys,
Sorry, i diden't find R376. the schematic seems not to be for the same model(my MB is scala3-17 and i can't find anything about that).
I removed Q43, and now i have 1.5V on pin 30 of ram slots , but nothing yet on cpu core coils 0V.
thank you,
[ATTACH]215059[/ATTACH]
[ATTACH]215061[/ATTACH]
[ATTACH]215060[/ATTACH]Re: SAMSUNG scala3 cpu core missing
Hello Guys,
Sorry, i diden't find R376. the schematic seems not to be for...Last edited by freeboxman; 07-01-2020, 12:48 PM.Leave a comment:
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Re: SAMSUNG scala3 cpu core missing
Hello,
CHP3_DRAMRST_GATE i have 3.3V, but MCP1_DRAMRST_DRIVE# show 0.085V.
also MCP1_DRAMRST_DRIVE# come only from R393(other side of R393 connected to ground) and CPU pin R8 how can i test that pin?
all resistors and caps values are good around Q43.
thank you for your help.
[ATTACH]215009[/ATTACH]
[ATTACH]215010[/ATTACH]Re: SAMSUNG scala3 cpu core missing
Hello,
CHP3_DRAMRST_GATE i have 3.3V, but MCP1_DRAMRST_DRIVE#...Leave a comment:
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Re: SAMSUNG scala3 cpu core missing
Hello,
DRAMRST 1.5V comes from where? Q43?...Last edited by freeboxman; 06-29-2020, 11:20 PM.Leave a comment:
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Re: SAMSUNG scala3 cpu core missing
Thank you for your help.
DRAMRST on pin 30 slot 1 or slot2, i have 0.0852V
Consumption with ram 0.2A, and without ram 0.19A~0.2A
Coil L3 Ram power i have 1.5V
i think the board is petronas, look like the same.
Thanks,
[ATTACH]214949[/ATTACH]
[ATTACH]214950[/ATTACH]Re: SAMSUNG scala3 cpu core missing
Thank you for your help.
DRAMRST on pin 30 slot 1 or slot2, i have 0.0852V
Consumption...Leave a comment:
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Re: SAMSUNG scala3 cpu core missing
Hello,
thank you for reply,
i have already to reflash bios, but nothing changed.
[ATTACH]214875[/ATTACH]...Leave a comment:
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SAMSUNG scala3 cpu core missing
hello,
I have a samsung laptop NP300E7A, after pushing the power button, nothing in screen and the fan spin full speed.
the issue started since putting admin and user password in the bios,
and also the cpu core was missing. I thought the bios was corrupted.
all power rails are good except the cpu core 0V, no short to ground in motherboard, the mosfets around the cpu IC showed 8 ohms to ground, but are good(tested outside motherboard with diode mode).
Before changing the CPU IC isl95831, i would like you to comment if there are... -
Re: Samsung np300e7a bios
thank you for your help, but didn't solve my issue.
the issue started since putting admin and user password in the bios,
and also the cpu core was missing. I thought the bios was corrupted.
I'm going to open a new post for that.
thanks...Leave a comment:
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Re: Samsung np300e7a bios
Thank you SMDFlea.
i will try it....Leave a comment:
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Re: Samsung np300e7a bios
Hello,
I'm back
[ATTACH]214779[/ATTACH]
thxRe: Samsung np300e7a bios
Hello,
I'm back
[ATTACH]214779[/ATTACH]
thx...Leave a comment:
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Samsung np300e7a bios
Hello,
i need a SAMSUNG NP300E7A BIOS .
the mother board is,
SCALA3-17 rev1.3 BA41-0175A HST
THANKS -
Re: SCALA3-17 rev1.3 BA41-0175A HST Schematic
thanksLeave a comment:
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SCALA3-17 rev1.3 BA41-0175A HST Schematic
Hello,
i need a SAMSUNG NP300E7A SHEMATICS diagram .
the mother board is,
SCALA3-17 rev1.3 BA41-0175A HST
THANKS -
Re: boardview dell n5010 dg15 09909
hello,
i find it
thanksLeave a comment:
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boardview dell n5010 dg15 09909
hello guys,
i have some issues with my laptop(short to ground).
somebody can help me to found boardview for dg15 09909-1 48.4hh01.011 uma?
thanks
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