Bonzas
Badcaps Veteran
Last Activity: Yesterday, 07:19 AM
Joined: 01-20-2018
Location: Jawa Tengah
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where is the backup, you can upload here...
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Yups, in my case was this fet....
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[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"840 G3.png","data-attachmentid":3508054}[/ATTACH]...
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CAD boardview...Leave a comment:
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i mean if the prevoius bios have no display sir, try with virgin bios without any editing work. But when i copy serial number block even with hex editor no display again, i end up using hpdmi to fill dmi...Leave a comment:
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this patcher will work on corrupted bios or not sir ?Leave a comment:
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Tested by me, it will restart 2 times before give display...Leave a comment:
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From same board they use APL6002 or UP1905AMA8...Leave a comment:
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Do you have top view for this board ? your boardview only bottom view...Leave a comment:
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Richtek Product
RT8884B
Datasheet
[url]https://www.richtek.com/assets/product_file/RT8884B/DS8884B-01.pdf[/url]https://Richtek Product<br /> <br />...B-01.pdf[/url]...Leave a comment:
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I can't test your file right now, my customer took laptop cause she will use it for school until next week. i'll try if my customer back to my workshop. But thank for for file...Leave a comment:
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is this possible build full bios and ec from hp site ? i got board with blank chip both ec & main. i already try some bios from previous page, get 1 bios that work but late display. already try to build with latest Q78, clean it but no luck. this bios take 1+ minute to display.
Maybe someone can help try this bios or help repair it
Thanks...Leave a comment:
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do you have cad version for this bv sir ?...Leave a comment:
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try this.
remove hdd or ssd from your laptop, remove cmos battery also. When first booting, you should press F2 quickly. when you can enter bios, you need disable fast boot if your bios have this option
Hope this work...Leave a comment:
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Nah, thank you & upload cad version for this BV...Leave a comment:
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can you upload again sir ?...Leave a comment:
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There's boardview on here
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/101615-lenovo-ideapad-s145-15ast-schematics?p=1759252#post1759252[/url]https://There's boardview on here<br...t1759252[/url]Leave a comment:
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If you brave enough, remove R19 and make jumper on invt_pwm side from 3vs. But make sure no short on invt_pwm pin...
Last edited by Bonzas; 07-15-2024, 07:02 AM.Leave a comment:
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Measure this pin voltage on JEDP1 :
1) +LEDVDD ( 19v )
2) DISPOFF# ( 0v = active low )
3) INVT_PWM ( 3v )
4) LCDVDD_CON ( 3v )
but before doing that. if it's me, i'll try with another lcdLast edited by Bonzas; 07-15-2024, 06:06 AM.Leave a comment:
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