HP Probook 430 G2 (LA-B171P) Battery not detected

[RomanSko1]

Hello, gentlmen!!!
My HP Probook 430 g2 does not detect battery. I tested the battery on another laptop and it is OK.
I believe smth is wrong with my PC ((.
Searching this forum I found some nice suggestions.
So, I tested Battery Connector pins (charger in/battery out) and here are my results:

pin_1 0v (-)
pin_2 3.30v
pin_3 0v
pin_4 3.38v (SCL)
[B]pin_5 2.55v (SDA)!!![/B]
pin_6 2.25 (+)

As far as I understand SDA pin must be ~3.3v???
Are there any other tests I can do before disassembling motherboard?
I...

[tuankietkiet]

When plugged in (no battery installed), the battery light on the motherboard lights up and then turn off. When powering on, the same and light and the power button also light up in a white color but no output on the display. It stayed like that for a few seconds before shutting down. I also seem to ruined a connector that connects to the WLAN, 2 USB and audio board, the same board also have a melted 2062A IC. I will post pictures in the reply section

[tuankietkiet]

When plugged in (no battery installed), the battery light on the motherboard lights up and then turn off. When powering on, the same and light and the power button also light up in a white color but no output on the display. It stayed like that for a few seconds before shutting down. I also seem to ruined a connector that connects to the WLAN, 2 USB and audio board, the same board also have a melted 2062A IC. I will post pictures in the reply section.

[Wanderer2467]

Hello all.

I am trying to repair a Gigabyte Z490 Aorus Elite AC motherboard that was roughly handled. It had some components ripped off the bottom of the board. The last two I am trying to replace are shown as CKA_FB1 and CKA_FB2 on the schematic and I think they are SMD 0402 30nH inductors to control the resonant impedance of the control rails. I have measured approximately 3.3VDC at CKVDD as per image below. On the board the still in place CKA_FB3 is 1mm x 0.5mm SMD component with a dark body.

I am not familiar with the symbols used in the schematic below if anyone...

[Hasith]

I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.

It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)
1.3V on pin 1(VREF2)

But only 0.46V on pin 7(LDO)

Is this means Chip is gone?

I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.

It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)

[warsztat]

Hi, Dell Latitude E6440 VAL90 LA-9931P nRev:1.0(A00) black screen, if I push power button with "D" keyboard is test picture on screen.
Bios from machine (main+ec)
Stickers illegible...

[Lazezo]

can any one help me bypass bios password for lenovo g570 core i3 model 20079
from sys info
bios version lenovo 40cn28ww(v2.14) 7/10/2011
smbios version 2.7
bios mode legacy
i want to enable virtualization but i forget bios pass
there s topic talking about shorting 2 pis of eeprom to bypass bios pass
can any one tel me where is that eeprom and if this method will work or not?

this topic show that password can be recovered from bios bakeup bin

[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/84684-lenovo-g570-hdd-password-remove[/url]...

[ekonom-pc]

Gentlemen, please help me Remove the BIOS password DELL 9520 GD55 LA-K441P...

[vincent999]

I had problem with "Ideapad slim 5 16ABR8"
I believe 19V power line is shock to ground. M/B is not charging from Adaptor ( Adaptor is good ), Not sure about Power Jack but I like to make sure before changing the power jack. Laptop is on with battery but hot to touch near batter connection (Please see pic). I don't repair this board before and I'm beginner. Try looking for schematic and board view online but still no luck. Schematic or other help would be greatly appreciated.

Thanks

HLS4A LA-M653P
Rev : 1A
2022-12-27

[lorins_core]

Hello to all.

may I have a question about these Semiconductor parts BQ24800RUYR? can it be replaced with these parts BQ24780SRUYR?

I need some good advice and also some information about it. thank you and God Bless...

[yooolaaa]

HUAWEI MateBook X Pro 2022 12th
If you can, you can keep the DMI information
[ATTACH]n3268677[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"2024-05-11 093312.png","data-attachmentid":3268678}[/ATTACH]HUAWEI MateBook X Pro 2022 12th
If you can, you can keep the DMI information
[ATTACH]n3268677[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"2024-05-11 093312.png","data-attachm...

[budwich]

Got this projector which has a problem with a lack of blue. Menu text is very yellow... expecting white. If I input a signal from a test disc via hdmi, a red screen image shows a uniform red as expect. Green similar while the blue does show but with non-uniformity. Looked at the in-polarizers. They are all good and clean. Running the projector to expose the light area in the prism block, shows each color well represented, all looking about the same intensity from the naked eye. Looking at the prism block itself and sending a light source back into the "out port", the individual...

[smlcup999]

Please i need help. I have the password but tried to removed COMPUTRACE using auto patcher. Now PC stuck on entering setup....

Original BIOS backup is attached.
Thinkpad t470
System model: 20HE19098A
BIOS: N1QETA2W (1.77)
type: 20HE-S6F801
S/N:PF-10QL18 17/12
LABEL P/N: 10M95087...

[osbln]

Hello everyone,

I like to repair everything I can get my hands on.
A friend gave me a laptop that fell down while it was switched on.
Now the display remains dark and the laptop no longer boots up.

Since my English is not so good, I worked with a translation tool. Please excuse me if something is not translated correctly.

Normally this device is not in a price category where you have to grit your teeth, but I really want to find the error and learn something in the process

Details of the device:

Manufacturer: Lenovo...

[Rezendes]

Hello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.

I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.

The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There...

[James Boden]

Good evening, I've been stuck on a problem for a smidge now and not sure how to proceed..
Ps5 boots etc but just doesn't have any video .. put a new hdmi connector on and a new encoder.. and all the diode readings are good except
15- DDC clock - 671 - Iam getting 677
16- ddc data - 671 -iam getting 677
And hot plug (19) is 695 when should be 686..
Any ideas on what could cause this ? I have no knowledge of hdmi signals or EDM 033 board view to track where they go etc ..

Jim

[PITERPENY]

HI. I need help with this board! 5v/0a stable. Replacing the u7000 did not change the situation. Before I move on to replacing the SD3215, maybe there are some tips on what to pay attention

also need a diagram and boardview
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"820-00840.png","data-attachmentid":3268566}[/ATTACH]...

[mrgumshot]

[ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3268557}[/ATTACH] Hi All,

i’ve got a Asus laptop on my bench here with a shorted IC. I think its a Power regulator but i cannot find ANY info on this IC. I thought i’d try my luck here.

Had a coil which was shorted to ground. Injected 1V and watched this ic get hot under thermal cam. Removed the IC and the short was gone. Now its .3 voltage drop which is good.

So basically i need help identifying this IC.

it looks...

[PITERPENY]

Does anyone have a schematic and boardview of a motherboard with this chip?
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"820-00840.png","data-attachmentid":3268537}[/ATTACH]...

[fricosu007]

Hello friends, today i got an A2485 820-02100-A in a desd state, found visual short on PPVIN_5VUSBC23 line, removed tantalum capacitor, installed same same value from other donor board, now there is no short on any of the rails but when i plug either magsafe3 or usbc inget 5v stable with 0.00 amps drown, no cycle, just these steady values, board is not in dfu mode, checked with magsafe and with usbc. Only value that i find on the board is ppdcin_aon which is 5v… i dont get 3,3 aon, 3v8 aon .. all missing, where should i start looking please !...

[max2711]

Power board BN44-00757A
I can't recognized IC9001, 8 pin IC.
Please, help

[mekvit]

Please i need the working bin my Asus S550CA

motherboard number : K56CM Rev 2.0

PROBLEM : shutdown every 30 minutes

below is the attached file...

[s_henya]

Hi guys,

i want to challenge myself to fix this graphics card- I know it's low value :-)
01g-p3-1313-kr (GeForce 210)
found 1 blown fusible resistor R56 ( already removed)
1 shorted diode D5 (already removed)
and i suspect short on U2 (ic itself isn't shorted)

i would like to know substitute diode and look at the diagram of that circuit....

[Byte_76]

Hi, I have some capacitors that I need to replace on a graphics card.

I've attached pictures for reference.

Please help me to understand the ratings so that I can order the correct replacements:

[B]1. G7 560 2.5E - I believe these are for vcore[/B][LIST][*]Is this 560uF and 2.5V?[*]What does the "E" mean?[*]Is there any relevance to the "G7"[/LIST]
[B]2. ECX 17 560 2.5V - I believe these are on the memory phase[/B][LIST][*]Another 560uF at 2.5V?[*]This is on the same graphics card. If the caps are rated the same as those above, why...

[milktoast56]

I am struggling to find the LPC_DEBUG header pinout for this motherboard, does anyone know it?
Thanks in advance

[brokenbot26]

My laptop is black screen, but have power. HP 14s-cf0121TU.
LED status - 3 long 2 short.
Already replaced with new Ram. Same frequency. But same problem.
Any other solution? I'll just test the bios if corrupted. Thanks.

[umit]

I need schematic please help

LA-946P REV:1...

[90Ninety]

Hi

I have a 453 Mini , two of the four Sata ports are not getting 12V . I am wondering if anyone has knowledge on hardware repair on these devices . I have attached an image of the board , it appears the Sata ports are powered in pairs , the right pair are working , left pair no voltage ( 0.2V)


I have tried tracing the 12V rail , though have not been successful . I am guessing there is a Transistor or Mosfet that is open

Any help , perhaps a schematic?


The board otherwise appears to work fine .. Boots up ,
...

[bilalinfotex]

HELLO ALL
IHAVE DELL 15 3000 i5 4gen dis gpu
i tried several bios no result
note all bin Which I tried are i3 UMA .
motherboard code
iris hsw bdw 14216-1
1XVKN REV A00
can you help...

[mandirinet]

please..need bios for acer E5-476 DAZ8VRMB8E0 REV E model...

[Byte_76]

I have a Gainward GTX 295 with two PCB's which has a broken SLI bridge ribbon cable. As a result, the card is entirely useless and I'd really like to fix it if possible.

I've searched eBay and AlieExpress but haven't been able to find the part.

I believe this same SLI bridge cable is used on the Nvidia 9800 GX2 and the GTX 295 which both have two PCB's.

Can anyone help me on where to get a replacement SLI bridge cable please?

[J8rda7]

Hi,
when I received this TV, there was a faulty T-con (missing all voltages, only 12V OK), black screen, sound OK, backlight OK.. So I replaced the T-con and now it looks like this.. Thank you Very much for any hints, what I must to check or measure etc.. Have a nice day and sorry for my english 🙂...

[celiabrown]

Hello guys,
My Plasma Philips 37inch chassis FTL2.1 does no picture ,and goes into protection mode after 30 seconds (red led blinks at 3Hz).


Can someone has any symptom like this ?

Thanks

[Rofix]

Hello everyone, I kindly wanted to ask you for advice, on this PC as soon as I connect the power cable without doing anything the part where the CPU, GPU is heated up, with the bench power supply it absorbs 600 mA, without battery, kindly since I'm here various coils almost short what can we start doing? thanks for any advice


[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"Asus 1.jpg","data-attachmentid":3268046}[/ATTACH]Hello everyone, I kindly wanted to ask you for advice, on this PC as soon...

[chth96]

I want to replace samhwa RG 250v 1uf capacitor which has no ESR value and has capacitance less than 280pf.
It is possible to purchase WCAP-ATG5 in local electronic shop.
But I want to know that whether WCAP-ATG5 capacitor has similar or better quality than smahwa capacitor or not.
Is there anyone who has experience to replace any bulge or faulty cap with cap from Wurth Elektronik?
[url]https://www.we-online.com/en/components/products/WCAP-ATG5[/url]https://I want to replace samhwa RG ...It is possible

[corrize]

[FONT=Calibri]Hello, I want to buy BGA balls (not stencils, only balls) but I don't know what size, it's just for reballing the new chip balled if the first attempt fail. So I will rarely use it. Probably chips are PMIC with max 60 balls. I don't need to reball EC chips from laptops of big chips like that.[/FONT]
[FONT=Calibri]So what are the 2 or 3 most used BGA balls sizes I should have for cover the jobs please ?[/FONT][FONT=Calibri]Hello, I want to buy BGA balls (not stencils, only balls) but I don't know what size, it's just for reballing the new chip balled if the first attempt fail.

[abajor]

I have a A2141 which fails DFU with error code shown in image.
Now instead of DFU it says "Recovery"

A little back ground on this laptop. I was thinking of writing a topic on corporate laziness and irresponsibility.
We acquired a handful of laptops which a very large company wanted to have shredded due to sensitive information.

Since apple has NSA grade drive formatting I think this is inexcusably lazy that the IT department doesn't just target mode format the drives and release the MDM, and donate the laptops.
Personally I think a large company...

[Traptor]

Hi guys,
I have a Gigabyte GTX 1080 G1 Gaming 8GB gpu. The earlier life of this gpu is unknown.

Fans are spinning on full speed.
All main voltages presents but gpu not detected by motherboard.
The voltage on pin 1 of the bios is constantly 1.8V

During visual inspection i noticed a brown spot on the top of the chip.
Maybe burned this GPU?

Does anyone have an idea where I should go next?
How do I check if the GPU is still alive?
[URL=filedata/fetch?filedataid=336585][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3267995}[/ATTACH][/URL]...

[MicroSMD Lab]

This laptop came in as no internal display. I did see it boot on an external monitor but it was not consistent, however, the bios splash screen was consistent. The customer said it happened after a windows update. I tested the display and there were no signals on the LED_EN or PWM test points. At this point I decided to treat it as a bios issue. I disconnected the RTC battery and drained the residual power. After this, I did not get the bios splash screen anymore. The power led changes colour, fans spin, GPU and CPU get warm and caps lock is functional. I tried the bios from the Clevo repo, there...

[PITERPENY]

Hi all ! I really need help with my motherboard! consumption 20V / 0.060-0.280 A is unstable! not detected in DFU! There is no picture on either the external or internal monitor!
PPBUS_G3H=12,61v
PPBUS_HS_CPU=12.61v
PPDCIN_G3H=19.94v
PP5V_G3S=5.12v
PP5V_S5_LDO=5.12v
PP3V3_G3H_RTC=3.3v
PP3V3_G3H=3.3v
PP3V3_G3SSW_SNS=[B][COLOR=#c0392b]2.3-2.6v[/COLOR][/B] is unstable!
PP3V3_G3S=3.3v
PP3V3_TBT_X_S0=[B][COLOR=#d35400]0v[/COLOR][/B]
PP2V7_NAND=2.513v
PP1V8_G3S=1.8v
PPVCC_S0_CPU=[B][COLOR=#d35400]0v
[/COLOR][/B...

[digtalhd]

Any help with
Lenovo ThinkPad L13 Gen 1
Serial: R9117ESC
EC: 256KB
Plz remove password.
Thank you....

[roshon]

does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]

[spleenharvester]

I bought one of [URL="https://www.aliexpress.com/item/1005002890887241.html"]these [/URL]as it was the only one I could find that is compact enough to fit in my toolbox (though I've since found [URL="https://www.aliexpress.com/item/32844169715.html"]KSGER make a substantially safer looking one[/URL]). It's one of those fan-in-handle things that has the 230V element in the handle. Quecoo briefly sold a [URL="https://www.aliexpress.com/item/1005004884759470.html"]similar unit [/URL]but discontinued it.. maybe they couldn't find solutions to these problems. I'm aware...

[gseeley]

Does anyone have a schematic for an HP ProDesk 400 G6 SFF main board?

I have one that blinks RED 5 times, pause, WHITE 7 times and repeats. This sequence isn't covered in the service guide. The closest is a memory issue but the one SODIMM is known/tested GOOD in another box (same model).

There looks to be some resistors(?) missing near BIOS flash chip.

[Luís Amaral]

Hello guys, i am working on a X512FF motherboard that comes dead, 19V stops on first mosfet, Gate only have 3v... if a make a bypass laptops works great with no problem... already tested the 5 mosfets, if i remove the current sensor PRS8901, the 19v appear...
Something with the 19V line and the charger detects and stop working !


Any advices ?...

[bociub]

Hi There

So I am looking for a part. Namely, a QqEEH. I beleive this is responsible to create the 3.3 power rail, but on my motherboard it is shorted to the ground. injecting 1 volt into the 20 volt power rail the IC heats up. Around the IC almost everything is shorted to the ground,
Anyone knows what this little controller chip supposed to be?

Thanks,...

[Ado02]

Hi,

I'm currently experiencing issues with my Dell Inspiron 5415. Initially, the laptop would sometimes fail to boot, with the keyboard backlight turning on but no display on the screen. After repeated attempts to power it on and off, it would eventually boot up and function normally.

To troubleshoot, I removed both the main battery and the BIOS battery, but now the laptop exhibits a different issue: the fan runs at full speed, but the screen remains blank, and it doesn't boot up.

I suspect there might be a problem with the BIOS, and I would like assistance...

[ductranvinh]

i have problem with vcore on this product then i need boardview to repair.
Model: Prime H410M-CS
Brand: Asuck...

[angelos]

Hi guys,
A few days ago i asked a real hard question regarding plasma tv's but nobody could respond. I need to ask if anyone has replaced this IGBT with another type that actually worked.
The industry is awash with fake chinese knock offs.
I am so frustrated.
Kind Regards
A Anagnostou

[saeidp9]

Boardview and Bios AIO Asus ET2020A

[jm1234]

Hi, I'm seeing one 9V relay having temperature 40C on its 9V (primary) side. Does that seem right? I switched 2 relays on that board and the temperature was the same (on the same position), so I'm sure it's not a faulty relay. I measured voltage on that relay and it was 9.5V DC, so that looks good. I don't see any other relay on that board having that kind of temperature and they have 9V on them too.
I thought maybe the transistor that is switching this relay keeps switching on/off, so I also checked for AC and there was almost none: 0.3V using mV range. No steady frequency was shown, but...

[Awsan]

Hello everyone, Due to a bad bios flash this Omen has a weird issue.

In the BIOS it says the ME version is 0.0.0.0 and when I try to update the BIOS it writes the bios region but when it reaches the firmware and ME it says it failed.

Tried HP USB recovery way and nothing worked.

I am kinda stuck, the main problem right now is the laptop would boot within 5 mins until the ME drivers load in windows and all works normally....

[riparo]

Hi everyone, I have a problem with a Samsung TV model UE50NU7400, I don't have the stanby LED, on the power supply board after a first check I found the fuse blown, and the 2 KF7N50 transistors on the primary power supply both short circuited, I replaced the fuse and the 2 transistors, now the short circuit has disappeared but I still don't have the LED off, do you have any suggestions?...

[samstown]

Hello,

This special tool from Apple is used to recover data from Macbook A1706. I've been using it for a while but it stops working. When connecting Thunderbolt 3 between the tool and working Macbook, Macbook should prompt "new device detected, allow or not"... but it doesn't.

Has anyone ever experience this ? It's not a cabling or power supply issue, some IC have stopped working but not sure which one. Probably the one that manager thunderbolt 3

Thanks
Claude...

[Biostechnology]

can u help someone nm-c121 tested bios...

[ImpossibleRepairs]

Hi Good peoples;

trying to identify manufacturers of this slide Pot from a Flight controller;

there is also an S W or M S printed underneath;

Sorry I couldn't get a better picture;

please and thanks as always

[Aleixpaolo]

Hello, please, could someone help me with my password problem with an asus F15- tuf 506H?

serial number : R1NRCX06Z23205A
full model machine : TUF506HC-HN088
board number : DAONJJMBAGO rev.G

Thanks in advance