Thank you! That worked
For anyone that comes along at a later date and has problems reading the WSON (TDFN) eeprom chip, there is a large central ground pad on the bottom of the chip. At least on some programming adapters, this ground pad can contact the outer data/power pads. See attached pic's. (Note: I've put kapton tape over the central pad in this case to prevent unwanted connections). (please excuse the flux mess - should have taken pics after cleanup). Hope this helps someone....
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
-
I have a Dell Latitude 5500 with a BIOS password. Service tag is 6NV40R2. The motherboard is an LA-G901P Rev 1.0. Attached are the contents of the two EEProm chips on the board (25Q256JVEQ and 25Q80CSIG) read using an xgecu T56 programmer. Can someone remove the password or provide instruction to remove it?
(edit: added pic of eeprom locations for those that come across this in the future)...
Leave a comment:
-
"It's ALIVE!!!" [in my best Dr Frankenstein voice impression]. In all seriousness, I sincerely appreciate your help and pointing me to the right spot. It now works as it should. Thank you!!
Leave a comment:
-
Trying to remove a power-on password on a Lenovo Ideapad S340-15IWL, serial number MP1LXEN3. I tried the method in section 3.7.3 of [URL="https://www.badcaps.net/forum/showthread.php?t=103526"]BIOS guides, methods, resources and tools[/URL]. Specifically, I read the bios (actually, read it twice (removing and reinserting the chip from the programmer between 1st and 2nd read) and verified SHA-256 checksums to verify good read), cleared the chip, then programmed the bios that I had read back to the chip (I then re-read the chip and verified the sha-256 checksum to verify it programmed...
Leave a comment:
-
Thank you! That one also worked without any problems. I am sincerely grateful for your time and help!
(To anyone who happens upon this in the future, this is an example of the importance of donating to keep this site alive. This thread is an example of two laptops saved, and there have been many others where I simply found the info I needed without having to post. Without this site, many machines would not have been fixed or not have been fixed so easily.)
Leave a comment:
-
-
Will get another dump tomorrow (and this time check the compressed size before i upload)
Leave a comment:
-
THANK YOU! That worked, power-on password gone! As I mentioned in the first post, I have two of these laptops. The second is the same model, with the serial number: M7N0CV08765227C. I don't mind doing the work if you can give me some guidance on the process to use. If you'd rather do it and post back the bios that is fine as well. Attached is the BIOS dump from the 2nd laptop....
Leave a comment:
-
Original BIOS re-uploaded. Asus Vivobook X712J serial number MG7N0CV08765227C....
Leave a comment:
-
Thank you for the reply. I will be able to in about 8 hours. (the serial number is MG7N0CV08765227C, the zipped bin file was originally attached but has dis-appeared from the posting)
Leave a comment:
-
Asus Vivobook X712J bios
I am attempting to remove a power-on password on an Asus Vivobook X712J, sn MG7N0CV08765227C.
The motherboard is X512A R.20 (on the silkscreen), and 13NB0KS0AM0101, 13N1-78A0101 (on sticker).
The EEPROM chip is 25B127DSIG by GigaDevice.
Attached is the BIOS dump as received. I have tried the info posted at [URL="https://www.badcaps.net/forum/showthread.php?t=103526"]BIOS guides, methods, resources and tools[/URL] but when XORing the key found with the decryption key (posted by SMDFlea here:
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/85574-asus-tp412fa?postcount=2#post1544866[/URL]...
-
Just a quick follow-up for anyone who should come along in the future with this problem.
I had access to another of these laptops. The component appears to be a jumper (measured ~0 ohms with ohm meter, and doesn't have the appearance of the current sense resistors I've seen in other laptops). As a test, I jumpered it with a piece of copper wire 0.3mm diameter (28 or 29 gauge) and the laptop came back to life! (I don't think the part is a fuse, but if someone has more info, I'd be very grateful to hear it). Attached are pics of the good board.2 Photos
Leave a comment:
-
MSI GL66 11UEK, eDP LCD cable short damage
Working on an MSI GL66 11UEK. After re-assembly, I went back to double-check a couple things and forgot to unplug the battery. Managed to move the eDP video cable connector in such a way that the smoke was let out of a nearby component.
Currently, the laptop boots to external monitor. No video on built in LCD. I've attached another eDP LCD as a test (lower resolution), but no display.
Battery no longer powers laptop either.
Pins 3 and 8 on the harness looked potentially overheated / damaged.
Can anyone identify what the burnt component...
-
Re: Asus GL503GE 3.3 standby voltage low
VCLK (pin 19) of the charge pump does not go anywhere - the components shown in the schematic have an asterisk and are not populated on this board. Any other suggestions on what to check next?
Leave a comment:
-
Re: Asus GL503GE 3.3 standby voltage low
mcplslg123: yes to both (3V LDO = 3.3V; 5V LDO = 5.03V)
Regarding the 5V_S5 circuitry:
Feedback resistors:
R1 (PR432) measures 23.95kohm out of circuit
R2 (PR437) measures 15.43kohm out of circuit
PQ59: Rsd = 3.2Mohms
PQ59: Rgd = off-scale (>40Mohms)
PQ59: Rgs = off-scale (>40Mohms)
PQ61: Rsd = 2.9Mohms
PQ61: Rgd = off-scale (>40Mohms)
PQ61: Rgs = off-scale (>40Mohms)
+5V_S5 resistance to ground measures 2.2Mohms
...
Leave a comment:
-
Re: Asus GL503GE 3.3 standby voltage low
I actually had purchased multiple regulators (RT6575D) from Digikey when I placed the order as they were cheaper than the shipping. As such, I have new spares. Replaced the regulator with one of these. Still measures 0.735V on 3v_S5 trace.
Leave a comment:
-
Re: Asus GL503GE 3.3 standby voltage low
R3 (PR434) measures 9.56kohms out of circuit.
R4 (PR438) measures 14.69kohms out of circuit.
PQ60: Rsd = 0.46Mohms
PQ60: Rgd = off-scale (>40Mohms)
PQ60: Rgs = off-scale (>40Mohms)
PQ62: Rsd = 0.45Mohms
PQ62: Rgd = off-scale (>40Mohms)
PQ62: Rgs = off-scale (>40Mohms)
Both Mosfets measured out-of-circuit.
Both Mosfets Rsd was 2-3Mohms before measuring the Rgs - i'd guess the gate charged slightly due to the measurement being taken. (using Fluke ...
Leave a comment:
-
Re: Asus GL503GE 3.3 standby voltage low
It starts out in the mega-ohm range but after about 10-15 seconds settles at 13.4kohms.
Leave a comment:
-
Asus GL503GE 3.3 standby voltage low
An Asus GL503GE laptop arrived that had had a screw dropped on the motherboard while the battery was connected. This resulted in a physical damage to the 3.3v / 5v voltage controller RT6575DGQW (pu28 on schematic, page 40). Additionally, the trace to pin 12 (VIN 19v supply) was burnt.
Replaced the RT6575DGQW with a new one, repaired the damaged trace. Only getting 0.7V instead of the expected 3.3v standby voltage (3V_S5 on schematic).
Replaced the AON7408 PQ60 mosfet from a donor board as resistance was low on the gate (I did not write this value down, as I optimistically...
-
Re: HP Pavilion 15t-eg100 - corrupt bios
Just a quick follow-up: Resistance of cpu supply inductors to ground is 0 to 0.1ohms. Inspected all MLCC's for cracks under microscope - no problems found. Injected 0.8volts at coils, eventually current maxes out at 1.6amps at 0.8volts. Viewed top and bottom of board with thermo-camera - no hot or warm spots found. Suspect internal layer shorted (which may have enough thermal mass to not heat up enough to be detectable).
I don't think there's much more that can be done at this point to repair this (at least not cost effectively)....
Leave a comment:
No activity results to display
Show More
Leave a comment: