Dell Precision 5550 password help please

[SMDFlea]

I'm trying to remove bios password.
Board: LA-J191P
model: Dell precision 5550
Thanks.

Thread merged. Please post the service tag, read the rules -> https://www.badcaps.net/forum/troubl...before-posting

[Muhammad4848]

I'm trying to remove bios password.
Due to poor soldering skill, i used a clip to read and write the chip. after patched bios file and flushed it into chip, my laptop won't start and boot loop with max fan speed when trying to start( once power cable plugs in, it show dell logo one time. After that only keyboard led turn on and off and nothing on screen). The problem remain same even i flushed the original backup bios.
I think the possible reason is when i first read, the connection isn't good, so all my bios file are corrupted. If it's that case, is it possible to fix it? If not, maybe it's time to buy a new laptop LOL.
Programmer: CH341A
Board: LA-J191P
model: Dell precision 5550
Thanks.

Service tag: 5ZNYZD3-8FC8

[Muhammad4848]

Did you make sure to wait at least 2-3 minutes for motherboard to post ? in cases of BIOS removal or reflash motherboard will need to do fresh post and druing this fans will work at full speed

yeah longer than that, but no luck.

[Muhammad4848]

I'm trying to remove bios password.
Due to poor soldering skill, i used a clip to read and write the chip. after patched bios file and flushed it into chip, my laptop won't start and boot loop with max fan speed when trying to start( once power cable plugs in, it show dell logo one time. After that only keyboard led turn on and off and nothing on screen). The problem remain same even i flushed the original backup bios.
I think the possible reason is when i first read, the connection isn't good, so all my bios file are corrupted. If it's that case, is it possible to fix it? If not, maybe it's time to buy a new laptop LOL.
Programmer: CH341A
Board: LA-J191P
model: Dell precision 5550
Thanks.

I searched schematic and found this. Does this mean it can't be write without desoldering? but the programmer says write successfully, it's really confuse me.