Power switch board

johnyccc · 14 Apr 2016 at 22:36

I am having some trouble repairing a laptop, I believe the power board is damaged and needs replacing.

Does anyone know how inter-changeable these things are? The one that is faulty is a 15bft1-050203.

Would any component which fits the case be usable?
Thanks

ExRayTed · 14 Apr 2016 at 23:09

I've always hated repairing laptops

Depends largely on the make/model of laptop. That board looks fairly simple to replace with just a fiddly ribbon connector. What laptop is it?

johnyccc · 15 Apr 2016 at 03:23

It's a Medion MD 98733.

johnyccc · 17 Apr 2016 at 00:33

Any idea anyone?

crapler8 · 17 Apr 2016 at 15:32

Give us more info like.... what does it do. How it happened . and etc give us as much info as possible... usualy its a controller that gets damaged

johnyccc · 17 Apr 2016 at 18:26

The power button has always been of poor build quality and I think in trying to make it function, the friction may have scratched the board. I am able to start the laptop using a pin across the ribbon cable.

I was hoping that the keyboard could be set to start the laptop but I am not seeing anything in the bios.

biuro74 · 17 Apr 2016 at 20:16

I see that board is very simple. If board has not been halved (but this is easy fix as well), try to see if switch itself is damaged, If connecting to quick short any two pins from both sides (it should have 4 in total: 2 of each side) will launch laptop, you've got a solution - microswitches are about 1 pound.

Tealc · 17 Apr 2016 at 20:22

biuro74 said:
I see that board is very simple. If board has not been halved (but this is easy fix as well), try to see if switch itself is damaged, If connecting to quick short two pins from both sides will launch laptop, you've got a solution - microswithces are about 1 pound.

Exactly.

If you are just shorting the ribbon then just wire up any type of momentary switch across there and make a hole in the laptop for it to be pressed, that is if you can't replace or fix the existing board/switch.

Sounds like a very easy fix to me.

johnyccc · 17 Apr 2016 at 23:23

Thanks for replies. Embarrassingly, the simple fix has confused me.
Looking at the switches, I am unsure how I would go about connecting it.

itchy · 18 Apr 2016 at 00:07

Laptops are a pain in the arse to fix I have a few lying around to go to recycling.

Not worth it imop. Just tell them its dead and gut it for useful parts.

biuro74 · 18 Apr 2016 at 20:53

itchy said:
Laptops are a pain in the arse to fix I have a few lying around to go to recycling.
Not worth it imop. Just tell them its dead and gut it for useful parts.

Indians (from America) would say it's a waste, to get rid of whole bizon just because it can't move because it's dead

Switch is soldered to board, it's probably SMD (surface mount), so soldering point should be visible from switch side. First of all, check with multimeter if there's connection between those soldering points and end of a ribbon (so take this board completely off). If not - there's something wrong with a ribbon. If there's a connection - as I said, it should be connection between one line at the ribbon side and two pins at switch (the same side) - do it twice for each side & so it means ribbon is fine. You can check switch now with the same multimeter - touch 2 opposite soldering points with probes, and press switch... if pressed you whould have beep at your multimeter. If not - switch is to be changed.

FYI: I've change few such switches as they are very similar, if not equal to Renault Laguna card microswitches. This is a real pain: to open up a card (2 hours with sharp blade) just to resolder microswitch (3 minutes). This laptop is a toy ;-)