Hi everyone, I have this gaming laptop that during the usage suddenly shutted down. I disassemble it and take some mesurments. I have a lab supplier and a thermocam. I tryed injected voltage at the DCIN connector and I see this little chip went up to 85 deg (at 19V) this chip should control the battery charge. Next i mesure the resistence at the big coils on top of it and the value is 0,4ohm so dead short.. Those 4 phases are the power supply of the Nvidia GPU?
I tried to inject 1V at that coil and i get 1.35A dwawn but nothing heat up...

Wooow, there's still people introducing themselves even to this day.

The zoomers yearn for the forums. Me included although I never really stopped using them, but I've found myself signing up for more and more these past few years.

I'm an ex-field technician, and to be honest I came here solely for the U1 tool. My version is about 4 years old and doesn't work as I remember it should, I don't even really know *why* I need it, I just know that my legit version errors out.
I've worked in the repair side of things professionally for about 5ish years now. Before I was...

Hello!

Just noticed this original “introduction” forum. I find it nice to know other members better, so let's introduce myself too. But first I want to mention my old computer junk hanging out somewhere in the house. My first computer was a Philips P2000. This was a robust reliable machine and my exemplar was a limited edition with 512 Kb memory (64 was standard). I tried some assembler programming and that was YUK! I agree 100% with Topcat if it is about machine code or 3GL programming languages. My second computer was a Philips MSX-II. Played with Turbo Pascal, Basic, but still...

Hi,
I also just got one HP 4540s with similar problem. After plugging in the power adapter power led blinks few times and the fan spins for a second and after that full shutdown fan stops and all lights go dark. I don't have the battery to test it.
Pressing the power button turns the fan on and few blinks from power led and after a second full shut down by itself.
After disassembly mainboard behaves the same with no cpu, ram, wlan or anything connected to it except power adapter, tried with more adapters, same story, they all work on other laptops.
Power button works fine,...

Hello
I have this laptop HP 14-dk1003dx which has the following problem:
Power LED and fan cycle abuut 4-5 seconds on, 2 sec off, current draw is around 20mA from bench PSU

Board model: 6050A3176101-MB-A01, no schematics found, closest boardview is this 6050A2983601 : [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/3292286-hagrid-6050a2983601-mb-x01-boardview[/URL]

Original fault was shorted main 19v line by mosfet Q66610, no LED at charge...

Hi everyone,

I'm the latest one to join the ever growing group of thousands of people screwed by the horrible HP bios upgrade that bricks your laptop

Anyway, I'm currently waiting for the 8 pin clamp adapter to arrive in the mail, because I'm extremely bad with soldering irons. I'm trying to reflash the eeprom without desoldering the chip.

I've taken the HDD out of the laptop, and I've inspected the HP folder in the EFI system partition. I've found a log file that hilariously says that everything went perfectly fine! (hahahah, YEAH, SURE!) and a "reconstructed"...

try post #4..
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-desktop-motherboards-graphics-cards-and-pc-peripherals/bios-schematic-requests/3520940-bios-for-hp-24-xa0019-offset-required[/url]https://try post #4..<br /> [url]htt...required[/url]...

i have hp pro one 600 g4 with 3 long beep and 4 short beep power error

serial number : JPG947J18R
OLD BIOS...

Here are some suggestions:

1) Confirm if the large cable @ CN200 are linked to the keyboard.
2) Locate the replacement keyboard on the internet. Often, the same replacement part will be compatible with other models from the same vendor, HP.
3) Then hunt for the alternate HP models for which there may be schematics available. That is, we can learn from the available schematics on the pinout for this same keyboard cable (assuming it is a keyboard).
4) Then using a multimeter, you can trace this SOT23-5 device and hunt as to where it travels onto this connector. To...

Hi, I need schematic or boardview, I need to know what resistor to replace the one highlighted, when I soldered the bios chip back one resistor flew off, I tried replacing it with another one but the one I put is a little bit larger and now the laptop turns on for 3-4 seconds and turns off and on back again.
MB version: 6050A2930901-MB-A01...

bios extracted from the HP site update..the laptop has three bios variants..yours is 0820D..DMI
6AC000 - 6AE0FF
KEYWIN 278000 - 27803F
Attached Files[LIST][*][URL="https://www.badcaps.net/filedata/fetch?id=2107543"]0820D.rar (4.92 MB, 61 views)[/URL][*][URL="https://www.badcaps.net/filedata/fetch?id=2107544"]08209.rar (4.85 MB, 43 views)[/URL][*][URL="https://www.badcaps.net/filedata/fetch?id=2107545"]08217.rar (5.56 MB, 42 views)[/URL][/LIST]​work ok for me thanks

• bios extracted from the HP site update..the laptop has three bios variants..yours

I hate to say it, but I just cannot recommend either Windows 10 or 11 for old people. It's a tricky OS (yes I grouped both into singular thing, because they are) and there way too many things "going on" or try to regularly steal your focus from whatever you are doing. You can quiet it down a bit if you take the time to go through every single setting to disable everything that your mother may not have a use for (read: this may take you upwards of a few hours... which is exactly why I HATE setting up Win10/11). Alternatively, you could use something like Tiny 10 or Tiny 11 - a stripped-down...

hello guys

can you help me
i have 2x HP4720s with H9265-4 48.4gk06.041
one spins fan but no image, no reaction to caps lock
other starts and respods to caps lock or restart with ctrl+alt+del but no backlight and no image on screen

one has i5 other i3 first gen with uma vga

i have reballing machine and i know that problem is ati chip but can you help me to convert it to uma, cos it will last longer then reball?

i tried on page 46 signal GFX_SEL to change resistors from R498 to R497 but it all remains the same

any...

thử
1. Serial Number BRJ33491BM
2. Sku Number 8U337LC#AK4
3. Product Family 103C_5336AN HP EliteBook
4. System Byte CT PQUFL0AXGIFKA7
5. Product Name HP EliteBook 640 14 inch G9 Notebook PC
6. Build ID 22WWRTDZ601#SAK4#DAK4
7. Feature Byte 476J6S6b7B7H7M7Q7W7maBaEapaqauawbhcAcyfPguhKhkjhk8mEn7nVpDpVpnpqprqjqz.55​...

Downloaded BIOS-es from HP website:
[URL]https://support.hp.com/hu-hu/drivers/omen-by-hp-15-dh0000-laptop-pc-series/model/29377806?sku=7GV15EA&serialnumber=CND94617GD[/URL]
This modell has 4 different BIOS that has 16Mb size. I have backed up the current one and its version is "08600" but Since the laptop been in a repair store I cannot trust the BIOS version is correct.
Tryed all 4 of them and only the 08601 is doing different caps lock LED codes on start, every other is giving 5 long 3 short.
08601 starts with the following. symptom:
Lptop starts 3...

good morning

I've had this laptop sitting at home for many years with this defect, and now I have some free time and I'd like to fix it.

9 years ago I tried to sell it to a woman, she kept it at her house for a few days and then returned it to me broken (hinge). I bought the hinge and a new flat, thinking the problem was in the flat, and it wasn't...

The screen connector part is in the photo below, I measured the voltages with a simple multimeter and the measurements were as follows:​


1: 1,3V
2: 1,2V
4: 1,3V
5: 1,3V...

I have an HP 15-DY laptop in because the battery is not charging.

If I use a charged battery, the laptop powers on but the battery will not charge, however the orange charge light does turn on. The laptop loses power as soon as I disconnect the battery.

I've replaced the BQ247 chip with a known working one and I get the same issue and the same measurements.

Measurements are as follows:

BQ728 IC
VCC (Pin 20) => 19V
CMSRC (Pin 3) => 0.8V (This is a problem but I can't figure out what's causing the low voltage)
ACDRV (Pin...

You have a laptop that does not power on, powers on but shows no image, crashes, etc… You want to fix it but you don't know where to start.

There are 2 situations:[LIST=1][*]You just want your laptop fixed[*]You want to learn about fixing laptops[/LIST]

Sorry, but if you're in situation number 1, we recommend you to use the services of a trustworthy professional repair shop.
Unfortunately, if you're not serious about learning, you will waste your time and money, and you will make us waste our time as well.

If you are in situation number 2, then...

Hi guys, I need a big help.
i don't have 5valw, (pu12)
the signal (pin 1) from pu12 has 0,11v.
I go back and it comes straight from the EC (pin128) same thing, no sulfate or anything.
then looking at the diagram I see that pr185 is not present, but if you have 3.3v so I make the bridge, now the mother is with a consumption of 50ma put the source. but there is no case nor responds the power button.
With this if I have 5valw.
I leave measurements I made
u3 bq738h
1 19.5v
2 19.5v
4 25.4v
5 3v
6 2.71v
11 2.9v (without battery)...

Can I ask for checking my bios and clean the ME region?
HP pavilion gaming 15-dk1604nc
sn: CND0444S7M
board GPC52 LA-J641P rev:1.0
Thank you...

Update I did after all decided to buy a new business grade laptop computer from Best Buy they had a sale on this one and while I was there inquiring about this particular one so was another customer and the location that I was at they were completely out of
stock but another location had 9 of them in stock but by the time I got to the other location they only had 4 of them left in stock

The selling points are size of the hard drive and the amount of RAM it has for the price one other nice feature is the touch screen is nice because you can move the pointer where it needs to...

Hi to all,
the owner of this machine gave it to me after having opened it to take off the dust from the inside, telling me that after that it didn't start anymore.
I found that one of the DrMOS (AOZ5016QI) on the CPUCORE was shorted between VIN and VSWH, and that one of the two n-mos connected to the power jack was shorted aswell.
I unsoldered the two shorted components and verified that there were no other short circuits, then decided to power the mainboard, firstly with the lab power supply, then with its original HP 200w charger, but the behaviour is the same, the board starts...

[QUOTE=SMDFlea;n3606496]

Same results with all the 3 EC+BIOS pair as before.

Also I have got an HP power adapter 230W and I have borrowed an adapter to try 7.4x5.0mm -> 4.5x3.0mm center pin). Its lowering the AD_ID value so after adapter AD_ID is only 0.6V (thinks its a 65w charger) and the laptop not reacting to power button (obviously). So I know that EC is working at least that part.
Try to get a genuine charger and get back to you.[QUOTE=SMDFlea;n3606496]

Same results with all the 3 EC+BIOS pair as before.

Also I have got an HP power...

hello guys l have an [B]hp elitebook 840 g3 board number 6050A2892401 MB A01 it's not turning on checked first moseft 19v is present but on the current sensor am getting 4.2v l tried to changed the first moseft but am still getting 4.2v on the current sensor.
I tried to trigger the first moseft drain and source pins using a twizzer when l checked on the current sensor 19v was now present ,the moment l removed the twizzer on drain and source voltage drops to 4.2v

what could be the issue[/B]hello guys l have an [B]hp elitebook 840 g3 board number 6050A2892401 MB A01 it's not turning