Med-Tech

New Member
Joined
Jan 17, 2024
Messages
1
Likes
0
Points
1
Age
45
#1
Hello,

i have a problem with a my HP laptop. No startup or led power light, when I plug in the mains supply. After testing the 19V rail, up until the first MOSFET all seems good. The first MOSFET measures 19V in, but output voltage fluctuates. Output measures 14V (or there abouts) and begins to drop to around 2V and then increases again. I have replaced this MOSFET to no avail. I have tested for a short, but I am unable to locate one. Has anyone experienced this type of behaviour? Or perhaps someone has an idea what could be this cause of this?

Pic with measurments attached. Mobo G34A Pic 1.png

Fingers crossed that someone can enhance my knowledge and help me finally repair this board ;)
 

Laptop repair Latest videos

Latest threads

HOW TO UPGRADE DPOX180H-FNIRSI FIRMWARE TO FIX ALL ISSUES

HOW TO UPGRADE DPOX180H-FNIRSI FIRMWARE TO FIX ALL ISSUES
Digital Phosphor Dual Channel Handheld 180 MHz Oscilloscope


修复问题:
1:能够看到方波上升下降的垂直线
2:修改了垂直电压光标测量的名称
3:修复开机语言
--------------------------------------------------------------------------------
Fix issues:
1: When measuring a square wave, you can see the rising and falling vertical lines.
2: Modify the name of the vertical voltage cursor measurement
3: Modified the text of the switching language interface.
--------------------------------------------------------------------------------
修复3点:
4:信号发生器频率问题
5:个别固件升级变砖问题
6:暂停后只显示单帧波形,便于分析协议
----------------------------------------------------------------------------------
Fix the problem:
4: Signal generator frequency problem
5: Some devices cannot be turned on after firmware upgrade
6: After pausing, only a single frame waveform is displayed, which is convenient for analyzing the protocol
-----------------------------------------------------------------------------------

2023/09/27 V40 LATEST VERSION
------------------------------------------------------------------------------------
修复内容:
7:波形更细,更清晰,降低了波形粗细
8:方波垂直线更亮,更明显
-------------------------------------------------------------------------------------
Fixes:
7: The thickness of the waveform is reduced, making the waveform thinner and clearer.
8: The vertical lines of the square wave are brighter and more obvious
--------------------------------------------------------------------------------------

Upgrade steps:
WATCH THIS VIDEO

DPOX180H FIRMWARE DUMP FILE OK V4.0 W25Q128

DPOX180H FIRMWARE
DUMP FILE OK V4.0
W25Q128 CHIP (16MB FILE)

13.6 "A2681 M2 820-02536 SCHEMATIC

13.6 "A2681 M2
820-02536
SCHEMATIC

ACER BAP10 BXP10 A01 Rev X01 6050A2350201 SCHEMATIC

ACER BAP10 BXP10 A01 Rev X01
6050A2350201
SCHEMATIC

Aspire A315-42 42G A515-43 43G EH5LP LA-H801P Rev 1A SCHEMATIC

Aspire A315-42 42G A515-43 43G
EH5LP LA-H801P Rev 1A
SCHEMATIC

ASUS ASUS GD30CI REV2.0 , REV1.01 ,V1.01 BOARDVIEW

ASUS ASUS GD30CI REV2.0
ASUS ASUS GD30CI REV1.01
ASUS ASUS GD30CI REV1.0 1
BOARDVIEW

ASUS C403PMI-60 BOARDVIEW

ASUS C403PMI-60
BOARDVIEW

ASUS C2011PI2 60YV06U0-VG0A01 Rev 1.00 BoardView

ASUS C2011PI2
60YV06U0-VG0A01 Rev 1.00
BoardView

ASUS CG161PI BoardView

ASUS CG161PI
BoardView

ASUS DUAL RTX2060S-O8G-EVO-V2 CG161P R2 BOARDVIEW

ASUS DUAL RTX2060S-O8G-EVO-V2 CG161P R2
BOARDVIEW

ASUS FX506IH DA0BKXMB8D0 BKX BOARDVIEW

ASUS FX506IH
DA0BKXMB8D0 BKX
BOARDVIEW

ASUS FX506L-FX706L DABKXDMB8E0-BKXD SCHEMATIC

ASUS FX506L-FX706L
DABKXDMB8E0-BKXD
SCHEMATIC

ASUS GA401QM REV1.4 BOARDVIEW

ASUS GA401QM REV1.4
BOARDVIEW

ASUS GA502IU REV 2.0 BOARDVIEW+SCHEMATIC

ASUS GA502IU REV 2.0
GA502IU AMD+NVIDIA
BOARDVIEW+SCHEMATIC

ASUS GA503QS REV2.0 SCHEMATIC

ASUS GA503QS REV2.0
SCHEMATIC
Top