Defective Hall sensor?

[rexxar]

My laptop seems to have developed a fault (again). It has a magnetic sensor to detect when the lid is closed, which seems to have died and is intermittently telling the system that the lid is closed. I'm assuming it's a Hall effect sensor. It's in a SMD transistor package (which I can't remember the name of), and it's marked 248jl. My question is, do these sensors often go intermittent like this, and where can I find a replacement?

[TheEPROM9]

If you can't find a replacement then it might be worth removing it and jumping it to always keep the display on. I assume that because you know which device it is, you have found a datasheet or other type of reference material.

[rexxar]

I can't find anything for that part number, though.

Removing the sensor has fixed the problem, but I'd still like to find a replacement. Any ideas?

[amyk]

Laptop model? It's schematic time...

[SeanB]

Small reed switch not a good substitute with an uprated magnet ( old CDROM optical block magnet) to drive it.

[rexxar]

Laptop model? It's schematic time...

It's a Toshiba Satellite L505d-ES5025.

I don't know much about hall sensors. Would any part off Mouser work as long as pinout and supply voltage is right, or is there some other characteristic to look for?

[Psi]

It depends what exactly the chip does. It could be a raw hall sensor or a module with amp or other logic.

[amyk]

Laptop model? It's schematic time...

It's a Toshiba Satellite L505d-ES5025.

I don't know much about hall sensors. Would any part off Mouser work as long as pinout and supply voltage is right, or is there some other characteristic to look for?

Datasheet: http://www.mst-mj.com/uploads/soft/110104/1_2252022661.pdf

You're welcome.

[rexxar]

Did you really find a schematic for my laptop? Where'd you come up with that?

[amyk]

No but I found the L500 which turned out to be close enough.

[djococaud]

Does anyone know why there is a varistor here (D46) ? Since it's not connected to the outside, what does this varistor protects ?

[SeanB]

This sensor is at the end of a cable exposed to the edge of the laptop where there is a strong chance that a charged up body will touch it at this point with enough stored charge to jump the small air gap to the internals of the unit. The VDR is there to protect the inside of the laptop, like the south bridge it is connected to directly, from ESD damage from these events.

[Sublime89]

I have the same problem with a hall sensor keeping my gateway laptop  screen from turning on. I'm wondering how I would remove the this sensor like op said he did and jump it to keep the screen always on?? Here is my thread if someone can help.

https://www.eevblog.com/forum/repair/faulty-hall-lid-sensor-laptop/

[dexters_lab]

in windows there is an option to disable the lid sensor in the power options