Hi, can you help me please remove BIOS password.
Dell Latitude 5420
ST: H64Z2D3
MB: LA-K491P REV: 2.0(A01)
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alontest
New Member
Last Activity: Today, 06:00 AM
Joined: 08-14-2018
Location: provincia
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Dell Latitude 5420
ST: 4VTXKN3
MB: GDF40 LA-K491P Rev.2.0 (A01) 2021-01-15
Lost original chip which was faulty, now tried around 10 different dumps from here and laptop does various things, either way stuck on Dell logo and 6 white 3 amber, or with other dumps screen starts doing diagnostics by changing colours and on off loop. Please helpLeave a comment:
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Re: ASUS ROG G513 Schematic + Boardview Needed
And board view...Leave a comment:
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Re: ASUS ROG G513 Schematic + Boardview Needed
Here you go, used to repair G533-6050A3250201 6050A3250203...Leave a comment:
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Re: Need help 820-00923 no backlight Newbie here
Fixed it, the problem was faulty Q8400Leave a comment:
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Need help 820-00923 no backlight Newbie here
Hello there, newbie here
Have a MacBook pro to repair with no backlight. Thought that it was a faulty screen, so tested with good known working screen but still no backlight. There are no liquid signs at all on the board, the board looks clean as new.
So started tracing all power rails and spot that PPVIN_S0SW_LCDBKLT was missing after Q8400 so found and replaced faulty capacitor C8473 and that fixed this rail but still have no backlight.
Started investigating further and spot that U8400 LCDBKLT_FET_DRV is 0V and it can't open Q8401. So is it a U8400... -
Re: 820-01521 schematic
You're a star! ThanksLeave a comment:
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Re: BoardView for the MacBook Pro 15" A1707 820-00281
Thank you !Leave a comment:
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Re: New Members - please post your introductions here
Hello to everyone!Leave a comment:
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