Hello, can someone please help me. i have a dead laptop mainboard, aspire a315-55 with board model DA0ZAWMB8G0 rev. G
upon checking of voltages at s5, 19v is present [USER="79413"]Vin[/USER], 5v and 3v is present at PL6001 and PL6000 respectively, but no signal from MAINON And s5_ON to be able to produce +3v_s5 to give power to vcc of BIOS CHIP U2. MAINON and S5_ON is coming from ec chip U37 it8987e/cx.
do i need to reflash the EC? any advice? thanksVin
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Asus TP412FA keyboard and touchpad not functioning
Hello guys,
need help, i have a laptop that i encountered having keyboard and touchpad not working, not immediately going to BIOS i already tried replacing even just the keyboard with a new one but still problem exists. now i only realized to checked it from bios to erase doubts. i found out both touchpad and keyboard are working only on BIOS but not on windows.
since i cant just reformat the said laptop, i tried installing MyAsus utility and updated my drivers , and windows update as well. i included updating the bios to latest 3.08 version. still kb and touchpad is working on bios...
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Thanks for the enlightenment. i misunderstood this until you response. so i should be looking for an edp type panel 30 pin from my stack of panels....
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LCD display for Asus X550LC rev. 2.0
Hello Guys, can you lend me a helping info out here...
sometime ago i teardown my ASUS X550LC laptop because of not powering up, 19v rail was missing. to make long story short, i was able to repair my board, problem is...i have mixed up my lcd panel to my spare of lcd panels in my table and i am confused which is which. all of them not working including the supposed to be my original lcd for this laptop. i cant test all of my panels because some of them are edp type and my lcd tester on hand is for LVDS Type only. my final solution is to buy a new one for this but dont know what is the exact...
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Thank you very much, i will update here for any result as soon as i tried your fw. noted on your advice for requesting a fw from a BIOS FORUM...
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thanks, i only read your reply this day only. and since i already bought a RT809H programmer my only problem is the firmware of the EC. should i ask here ...or should i start another thread for my firmware request...
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Acer E5-411 not powering ON
Good Day ! i need help, acer e5-411 not powering on, upon checking of essential voltages.....+3vpcu is present on PL2 and +5v on PL3 is also present. i only noticed that on CN4 pin 3 NBSWON# has no measured voltage only 0.02v and at pin 1 +3v is present, same result if i disconnect the power button pcb from that CN4 connector. what do i need to do? reflash the BIOS or reprogram fw of EC chip ? which one do you think do i do first? I have checked the NBSWON# rail for shorted to ground but it is not.
i can only reflash the 8mb BIOS , bin file comes from the other thread, if ever...my...
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sorry, it was a mistake. no enable signal for LDO1, that is why there is no voltage output for 2.5v ddr supply. My question is why there is no CLK reading on PIN6 of my SPI ROM chip, i measured it using multimeter and an oscilloscope. no clk input, that is why i cant move on another troubleshooting because reflashing of bios is non sense if my spi rom have no CLK on pin 6.
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You mean pin 6 of PU500? well its 150kohm and rising due to capacitor coonected PC520
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Update : i already tried several dump bios for this mainboard, but nothing happens. here is my observation...that my SPI ROM chip have no SCLK reading (pin 6) and SDO have nothing as well. i used multimeter and DSO for measurements. please help what am i missing here, why no SCLK and SDO reading? thanks...
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i already told in post #4, 1,11,16,29,31 and 36 have a logic high enable signal.....of course VIN is present because of PL500 have output, anyway i have checked it and VIN is present
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UPDATE : PU500 has the following output
* PL500 has 1.05V
*PL501 ...none
*PL502...none
LDO1 ----NONE ( supposed to be 2.5vDDR Supply )
LDO2...1.8V
pins 1,11,16,29,31 and 36 have a logic high enable signal
my question is...is this a sign of deffective PU500 chip (LV5075BGQV) ?
please advise...thanks in advance !!!...
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Yes it is, from logic high to logic low then back to high the moment switch was released...
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Lenovo laptop dead motherboard GS752 NM-C781rev. 1.0 2019-11-25 inscribed at the pcb,
I have a dead laptop with mainboard model GS452/552/752 nm-c781 rev 1.0, i have initiated troubleshooting with the use of digital multimeter. checked voltage signals up to PM_SLP_S3#, found out that before PM_SLP_S3# signal , a PBTN_OUT#_R signal has 3.2 volt state and after pressing power on, PBTN_OUT#, It drops to logic level zero for around 12 secs and then back again to 3.2v for 6 secs. it will loop like that until you pulled out the adapter power. during loop the PM_SLP_S3 and S4 SIGNAL has no output. (0 volt ) may i ask for help to anyone with this kind of board and same kind of problem....1 Photo
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acer aspire 5742z dead motherboard
hello, may i ask for help? i have a acer 5742z laptop with board PEW71 LA--6582P AND IT IS NOT POWERING on.
Here is the status:
1. c273 already have 1.5 v even at s5
2. 3v and 5 v always on power rail is ok as evident in u31 pin8 have 3.3v, pl46 and pl47 have readings.
3. JLED1 pin7 have 17.94 vdc for ON/OFFBTN# signal
i already flash EC BIOS and SPI rom but item #1 still exist. U18 i flash it with 4,096kb of bin file and U31 i flash it with 128kb. downloaded from other site. my question is it correct that u31 flash is 128kb and u31 with 4mb?...
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bios dump for Lenovo Legion Y520-15IKBN
does anyone here have a bios dump for lenovo legion y520-151kbn model 80wk
MTM 80WK0025PH with sn PF0Y5NBW
pcb DY512 NM-B191 rev. 1.0
LAPTOP powers on but no 1.2v for ram supply and PL3502, PL1401 have 0 volt output, 5v and 3.3v is present. all other coils dont have reading after switching on. only LED1 Indicator lits up. batt charging is ok.
here attached is my original bin file
Thanks...
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Re: Dell Latitude 3420 Bios Password unlock
im using ch341a programmer and the spi chip is a winbond w25r256jv...
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Re: Dell Latitude 3420 Bios Password unlock
i tried bin file that you unlocked but asprogrammer is freezing/hang-up.
isolated the problem by trying the original bin file and the password unlock only bin file with no problem....
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Re: Dell Latitude 3420 Bios Password unlock
@lapfix, sir, is there an option besides desoldering the chip and have it reflash by programmer? if none, then i have to do it all again byflashing with your new uploaded bin file for my bios chip.
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