Novatech W950BU laptop: Only 1 USB socket out of 4 working

[Nevillet]

Hi All,

I have a laptop with only 1 of the 4 USB sockets/jacks working.

The laptop is by a UK supplier called Novatech and the product number is W950BU. I have a USB tester that displays voltage and current and the 3 sockets that do not work have no power (and don't recognise anything plugged in to them either)

There are 2 sockets on the motherboard that don't work and 2 on a daughter board, one of which does work.

Using the Speccy application here is a hardware summary:

Operating System
Windows 10 Pro 64-bit
CPU
Intel Pentium @ 2.30GHz 33 °C
Kaby Lake-U/Y 14nm Technology
RAM
4.00GB Single-Channel DDR3 @ 797MHz (11-11-11-28)
Motherboard
Novatech W94_W95BU (U3E1)
Graphics
Generic PnP Monitor (1366x768@60Hz)
Intel HD Graphics 610 (CLEVO/KAPOK Computer)
Storage
232GB Samsung SSD 850 EVO 250GB (SSD) 24 °C
29GB USB Device (USB)
Optical Drives
No optical disk drives detected
Audio
Realtek High Definition Audio[/I]

Here are some pictures of the MB, the MB-USB sockets and the daughter board USB sockets.
The only USB socket that works is the one closest to the audio jack on the daughter board.


[IMG] https://www.badcaps.net/forum/attach...1&d=1641577153
[IMG] https://www.badcaps.net/forum/attach...1&d=1641577153

Any diagnostic suggestions would be great.

Many thanks.

[mon2]

Re: Novatech W950BU laptop: Only 1 USB socket out of 4 working

Hi.

Is the attached the same MB as yours ? There is a (paid) service manual with schematics available. Found this in my database.

Each USB port is mated (on good designs anyways) with a current limited USB load switch. The quality of the load switches vary with the wind.

Trace back VBUS to the controller IC noted in the attachment. If 5V enters but does not leave the switch AND the enable is ACTIVE then the USB load switch is damaged and needs to be replaced.

If the board layout matches yours, can post more details from the schematic.

The ENABLE pin is active LOW so confirm if the load switch is being enabled. Fairly sure that it will be a logic LOW (0 v) but if the load switch is blown out, then you will face the issues you have raised.

[SMDFlea]

Re: Novatech W950BU laptop: Only 1 USB socket out of 4 working

Its a rebadged Clevo W950BU.The service manual/schematic is free here http://repo.palkeo.com/clevo-mirror/W9xxBU/ .Log into the site with username repo ,and password repo.

[Nevillet]

Re: Novatech W950BU laptop: Only 1 USB socket out of 4 working

Many thanks both. I'll report back.