Please can someone help me, im trying to find the shorted component as i have a donor board that i can swop components from.
If i inject 2V/2A on DC in PU4201 gets really hot. ive changed out PU4201 from another board as well as a couple other Mosfets but PU4201 still gets crazy hot when i inject. Any ideas? im still a noob so am learning....
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by DELLS DEALS
10-29-2024, 05:58 AM
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hello
laptop hp zbook g3 la0c381p no power
PR315 pin 1 and 4 there is 4 volt
when i remove pr315 pin 1 and 2 = 19 volt
but pin 3 and 4 still 4 volt
pl59 = 450 om
pl39 = 400 om
pl40 = 420 om
pl37 = 550 om
no short on there coils
i flash 2 bios ic no new
i ve 2 laptop same problem
please help
and sorry for my english...Yesterday, 01:58 PM -
Hi,
my 7590 spontaniously rebooted and showed "workshop mode press ALT-F" in BIOS post, then worked normally for two days, after shutdown a few hours later is dead and doesn't power on.
After a few hours of measuring I didn't find anything obvious, although the 2.5 Ohm measured might be too low, but I never fixed a notebook before (only other things like TV power supplys)
Found the boardview cad and schematics in this forum.
Voltages +1VALW, +3VALWP, +5VALWP, B+, +SDC_IN, +3V_PCH are ok
+3VS and +5VS is 0 because signal RUN_ON_EC is 0 and UZ1 doesn't...Today, 02:31 PM -
I have an Asus X540ubr laptop of my customer.
The problem is it's not powering on.
When I check,all the voltages are ok.
I tried heating the motherboard with my soldering iron,after that it started to work fine and also charges the battery.
After leaving it turn off for 1 or 2 hours,then it's not turning on back again.
When I heat up the motherboard again,it turns back on again.
What would be the problem of this?Today, 05:57 PM -
Hi guys,
i own an HP laptop that suddenly lost all info in the BIOS (serial number, model number, UUID and so on) and the TPM module that used to work is no longer recognized.
I have Windows 11 installed, but it keeps trying to reinstall the system files without success because the TPM is not present.
Now i need anyone here to tell me which tools i need to try to reprogram the BIOS and reactivate the TPM module.
The laptop data are:
S/N: CND838BGBD
4TW61EA#ABZ
Model 15-da0117nl
RMN:TPN-C135
Many...Today, 05:59 PM -
Hello all.
I have this component... see images. It's off a Huawei laptop motherboard.
The writing on it is RX6J 2898.
Would anyone have an idea what this component is?Today, 09:09 PM -
Hello, I need remove the password to access the BIOS configuration. I already tried the auto patcher and it doesn't work for my laptop.
[ATTACH]n3506855[/ATTACH]
My laptop info:
Model: Lenovo g40-30 type 80fy
Motherboard: ACLU9/ACLU0 nm-a311 rev 1.0
Bios type: insydeh20Hello, I need remove the password to access the BIOS configuration. I already tried the auto patcher and it doesn't work for my laptop.
[ATTACH]n3506855[/ATTACH]
My laptop info:
Model: Lenovo g40-30 type 80fy
Motherboard: ACLU9/ACLU0 nm-a311 rev 1.0
Bios...11-13-2024, 08:32 PM -
Hi, I rescued a Samsung UN40H5003AF (H = 2014 FHD) from the curb. Symptoms are: standby (red) light comes on, stays on for 8 seconds, flickers off, then comes back on, and the cycle continues.
Service manual: [url]https://www.electronica-pt.com/esquema/tv/samsung-esquemas-tv/samsung-un40h5003af-chassis-u8la-71272/[/url]
SMPS board: checked voltages, all seem normal (A13V = 12.8V, UD = 3.3V, PWM_BLU = 0.77V, PS_OnOff = 5.5V). Remove 10p cable to main board -> backlight comes on. I think this means SMPS board and backlight are good.
Main board: BN94-07592P...Today, 10:31 PM -
Hello everyone! I am looking for a BIOS dump for the NP750XDA-KD3 (NB3586/NB3587_PCB_MB_V8 Rev:1.3).
Brought in not powering on after another service, with a damaged EC microcontroller and SPI loaded with a dump from KD2....Today, 08:58 PM -
Hello All,
Does anyone have the Boardview or the schematic for HP DA0P5EMB6E0 REV. E... ?
please share it if possible
ThanksToday, 09:56 PM
-
Hi guys, I have a problem with a CF-33 A model I5 U7300, I've tried to read a bios dump with no success, used some versions of AFUWIN and just one version did run, and Universal Bios Backup Tool Kit, but don't know if dumps are correct, could some of you help me to decrypt the password? Checked for Amitsesetup and it' there.
Thanks in advance...Today, 08:47 PM -
Hello all.
I have this component... see images. It's off a Huawei laptop motherboard.
The writing on it is RX6J 2898.
Would anyone have an idea what this component is?Today, 09:09 PM -
Hello everyone! I am looking for a BIOS dump for the NP750XDA-KD3 (NB3586/NB3587_PCB_MB_V8 Rev:1.3).
Brought in not powering on after another service, with a damaged EC microcontroller and SPI loaded with a dump from KD2....Today, 08:58 PM -
Hi, I rescued a Samsung UN40H5003AF (H = 2014 FHD) from the curb. Symptoms are: standby (red) light comes on, stays on for 8 seconds, flickers off, then comes back on, and the cycle continues.
Service manual: [url]https://www.electronica-pt.com/esquema/tv/samsung-esquemas-tv/samsung-un40h5003af-chassis-u8la-71272/[/url]
SMPS board: checked voltages, all seem normal (A13V = 12.8V, UD = 3.3V, PWM_BLU = 0.77V, PS_OnOff = 5.5V). Remove 10p cable to main board -> backlight comes on. I think this means SMPS board and backlight are good.
Main board: BN94-07592P...Today, 10:31 PM -
Hello All,
Does anyone have the Boardview or the schematic for HP DA0P5EMB6E0 REV. E... ?
please share it if possible
ThanksToday, 09:56 PM -
Hello, i need bios dump file for laptop Xiaomi Redmibook Pro 14 2022 (Intel i7 gen 12)
My laptop is bricked after try update bios myself.
I tried to diassemble, found 2 chips 16MB and 8MB.
I have flash programmer ch341
Thank youToday, 09:49 PM -
Hello everyone.
Would anyone have Schematics and Boardview for [B]Huawei MateBook_D15_2020 BoB-WAI9Q?[/B]
Hello everyone.
Would anyone have Schematics and Boardview for [B]Huawei MateBook_D15_2020 BoB-WAI9Q?[/B]
Hello everyone.
Would anyone have Schematics and Boardview for [B]Huawei MateBook_D15_2020 BoB-WAI9Q?[/B]
Today, 09:03 PM -
have this stripe on the screen..it does fill in when it sits on a page...but you can see the box type effect in the gray zone... ........Today, 06:37 PM
-
Hello! yes I know there is already lots of information about this issue. I have a Panasonic TC-P55ST50 that originally displayed an 8-blink error code. Following the troubleshooting flowchart, I ended up replacing the SS board. However, even after replacing it, the issue persists. The TV turns on and stays on without displaying an image, and continuity is confirmed on all connectors. What am I missing here🤔?
Ok Im a mechanical engineer ...but I thought I was able to follow a rather simple flowchart for electric troubleshooting 😂.
TV Model: Panasonic TC-P55ST50
...Today, 08:52 PM -
Hi guys I have this tv with this problem, I found it one strip led broken so I decided to change all of them (4) but the problem remains, the tv turn on wit sound led on but after second rebottet and then give me red led blinking (6 times) probably is something in the board broken, i replaced some capacitor that have lower value , take some measurements you're will se on the picture, but I don't have any schematic for this tv. Every reply is accepted! Thank you11-11-2024, 12:07 AM