I thinking to modify some ATX ver 1 supply, and wonder what if I connect 10k pot on 12v and center tap on brown wire? What range of 3.3v correction can to expect, or something will blow up if I close to rails, leave narrow 3.3v range?
It is KA7500B ic, but 3v3 sense is connected to TL431, I am not sure there is any connection between.
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by harp05-16-2024, 05:44 PM
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by NagyeszHi all,
Model: HP Pavilion 14-ce3010nh 8BV97EA
Board number: DAG7ALMB8C0 - G7AL REV C
Issue: I have an HP Pavilion 14-ce3010nh 8BV97EA laptop. When plugged into the charger, it turns on, but there is no display, the fans do not run, and the processor gets slightly warm. Unfortunately, I haven't been able to figure out what the problem is. I've reflashed the BIOS twice without any success. No post. Already tried out with another ram stick with no luck
I measured the voltage with the HP turned on in red, and I measured their resistance with the HP turned off in green....05-30-2024, 04:10 AM -
by Sofian75The laptop is working fine except that there is nothing on the screen.
I can use it with a HDMI cable on my monitor, the laptop display is not detected in the windows device manager.
I ve already ordered a new LCD assembly but I am worried that it could be a waste of money if the problem is somewhere else.
I took of the screen and can't find anything wrong with the cables, except I have 3v instead of 19v on what I assume to be the power pin (?)
What should I check?
Could it be a corrupted bios issue?
I can't find a detailed bordview so really don't...Today, 06:48 AM -
by noobartIs the only way to resest/delete the BIOS passwort removing and reprogramming the bios chip? Or is there any other easier method?05-28-2024, 10:04 AM
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by pc_okayHello guys,
I can't find any shematic for this board and i have a mofset (i think) completly burn.
I can't read the marking. :'(
Can someone help me please with photos attached?
Thanks !3 Photos05-27-2024, 09:12 AM -
Dell Precision 7920 MT7314 twc6k Tower Bios Bin
Currently what happens is that it just goes on automatically and has no display on the screen1 PhotoToday, 08:11 AM -
by gizahaHello. I have problem with Dell psu, outputs are ok but it does not give power ok signal.
It has a secondady board with wt7527s to check inputs. It doesn't give PGO because it doesn't take enough PGI.
It takes PGI from a voltage divider.
I draw a schematic for you to understand.
My first question is why 5v use two transformer pins, while 12v uses only one.
My second question, is pin 2 in transformer weak? After resistor, diode and voltage divider, result is 0.7v instead of 1.2v, so wt7527s does not output PGO....05-20-2024, 07:33 AM -
by Mita99Hi,
My wife loved suface book 1 needs to be repaired and I am looking for schematics and boardview data in order to try to attempt the repair of not charging the upper battery, If you have it please share with me, thank you in advance.-
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by spider300Does anyone have the Precision 5770 213024-1 BoardView file...
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I need a working bios file of this device.
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by Mita99Hi,
My wife loved suface book 1 needs to be repaired and I am looking for schematics and boardview data in order to try to attempt the repair of not charging the upper battery, If you have it please share with me, thank you in advance.-
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by MireniaHello everyone,
My Legion 5 15IAH7 won't post. won't boot. No fans, no keyboard backlight.
Online power led and charging led lights up.
My guess is that there is some issue with the BIOS.
It's the NM-E241 Rev 1.0 motherboard.
As I found out there are two BIOS dumps needed for this board.
One 16MB and one 8MB.
I've got both uploaded. Can you maybe check and fix this BIOS files?
Thanks a lot in advantage ...-
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Yesterday, 07:01 PM -
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by Sofian75The laptop is working fine except that there is nothing on the screen.
I can use it with a HDMI cable on my monitor, the laptop display is not detected in the windows device manager.
I ve already ordered a new LCD assembly but I am worried that it could be a waste of money if the problem is somewhere else.
I took of the screen and can't find anything wrong with the cables, except I have 3v instead of 19v on what I assume to be the power pin (?)
What should I check?
Could it be a corrupted bios issue?
I can't find a detailed bordview so really don't...Today, 06:48 AM -
by NagyeszHi all,
Model: HP Pavilion 14-ce3010nh 8BV97EA
Board number: DAG7ALMB8C0 - G7AL REV C
Issue: I have an HP Pavilion 14-ce3010nh 8BV97EA laptop. When plugged into the charger, it turns on, but there is no display, the fans do not run, and the processor gets slightly warm. Unfortunately, I haven't been able to figure out what the problem is. I've reflashed the BIOS twice without any success. No post. Already tried out with another ram stick with no luck
I measured the voltage with the HP turned on in red, and I measured their resistance with the HP turned off in green....05-30-2024, 04:10 AM -
Dell Precision 7920 MT7314 twc6k Tower Bios Bin
Currently what happens is that it just goes on automatically and has no display on the screen1 PhotoToday, 08:11 AM -
by sauceHi,
I have this laptop HP x360 1030 G2.
Battery is charging well, the laptop powers on the CPU gets warm but nothing on the internal screen or hdmi.
The fan is spinning at full speed.
Any idea ?
I just asked for a schematic i cannot find it.05-30-2024, 05:25 AM -
by Dallen BryceHello, I'm trying to remove the password from an HP Elitebook 650 G10. It's motherboard has two chips, a 32mb spi (W25Q256JVEN) and 32mb ec (GD25B256EYIG). I have created a dump of each, but don't know which one(s) to patch. Could someone point me in the right direction or just patch it for me?...
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by m.sabry2110Lenovo ThinkPad t550 bios password remove
type 20cj-s14p0c...-
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by svapoesmarthi to all
in the year i have find a lot of helpful information on badcaps.
Now i'm stuck on bios black screen after update for this ASUS. And for what can i understand is necessary to fill some information into the bin file but i'm not able to read this info the QR code on mainboard.
if someone can help me i really appreciate that.
info of the laptop:
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"immagine.png","data-attachmentid":3281981}[/ATTACH]
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by dario2308please,i need bios dump ideacentre G5-14AMR05,or ideacentre 5 14are05,desktop ryzen 5 4600 i attach my dump MX25U12873F 1.8vcc...
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