I need some help guys~ this laptop came in with a locked BIOS and went and flash the bios from HP web thinking i could do it this way but noooooo.. i bricked this HP -.-
lucky for me i had a backup but the backup is not working either, laptop boots but i get a blank screen, flashing lights. can someone help repairing the Bios file? i tried putting it though RCunlocker but did not work either.
Boardnumber 6050A2892301-MB-A01...
donnos
Member
Last Activity: 03-05-2025, 10:44 AM
Joined: 09-14-2016
Location: Kajang
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Last edited by donnos; 01-04-2024, 04:20 AM. -
Re: macbook pro 820-3462 charges very slowly
issue resolved by replacing SMCLeave a comment:
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Re: macbook pro 820-3462 charges very slowly
SMBUS lines are 3.34v
CSON to CSOP resistance is 3ohms.Leave a comment:
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Re: macbook pro 820-3462 charges very slowly
both Diode reading are 0.4 red on groundLeave a comment:
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macbook pro 820-3462 charges very slowly
Received a macbook pro which in notification shows 7 or 10 hours until full during charging.
have replaced ISL6259 and Q7055 and still getting same results. current sensing resistors measured fine @ 0 and 2ohms. what else could be the issue?
without battery i get 12.58V. i have physically shorted Q7055 drain to source to rule out issue with the mosfet and can confirm its still the same. any suggestions?
when i shutdown it charges at only 16.5v 0.5A. during boot PSU draws 2.5-3A suggesting it momentarily charges but drops to 1.5A power draw after boot. -
Re: A1989 Macbook Pro unable to reinstall macOS after DFU recovery
are you able to get into recovery? if yes go to disk manager and see if it is able to detect the internal HDD
if you have issues getting into recovery due to internet issues, suggest using a usb c to ethernet dongle and tryLeave a comment:
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Re: A1989 820-00850 does not boot when battery is connected
This is resolved. SYS_DETECT_L is internally broken at the battery data cable.Leave a comment:
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820-00244 Data Recovery
Hello,
i'm being tasked with data recovery with this dreadful mac12 which is famous for CPU issue.
at the moment there is no CPU Vcore and power sequence stops at ALL_SYS_PWRGD with the following missing PM_PCH_PWROK
anybody knows whats the criteria for PM_PCH_PWROK output from u7800? (no shorts on CPU side) -
A1989 820-00850 does not boot when battery is connected
Hi All,
have this macbook came in issues not able to turn on, found out the battery is blown(literally having holes in it). tried to do a battery swap and its still not booting up. However without battery connected, macbook boots up fine.
Tried battery from another vendor, macbook boots but does not charge, system reports detects battery data and shows battery "service recommended". this at least tells me that the SMC/T2 is working.
Tried changing ISL6240 chip and still the same. all 4 ports working fine,
Checked current sensing resistors all... -
Re: New Members - please post your introductions here
Aloha,
donnos from Malaysia, hoping to share and learn more from everyoneLeave a comment:
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