MBX-237 all capacitors shorted

[Learn2Day]

Hi guys,

I have a MBX-237 in hands which is shorted almost everywhere (see pic).

Need help where to connect my regulated power supply to inject current and detect shorted capacitor.

Thanks.

[trebo]

Re: MBX-237 all capacitors shorted

Hi guys,

I have a MBX-237 in hands which is shorted almost everywhere (see pic).

Need help where to connect my regulated power supply to inject current and detect shorted capacitor.

Thanks.

have a look at this, https://www.badcaps.net/forum/showpo...9&postcount=34
the whole thread got some great info
good luck

[stj]

Re: MBX-237 all capacitors shorted

use an esr meter to check the resistance across the cap pins.
the one that's shorted will read lower than the others because the others will have the added resistance of the copper tracks.

we used to use this trick to find bad ram chips on boards that had banks of 16 on them.

[dj_ricoh]

Re: MBX-237 all capacitors shorted

use an esr meter to check the resistance across the cap pins.
the one that's shorted will read lower than the others because the others will have the added resistance of the copper tracks.

we used to use this trick to find bad ram chips on boards that had banks of 16 on them.

does it apply with Bga to?

[lefos]

Re: MBX-237 all capacitors shorted

Try removing the middle in the first three capacitors area. Several times occurred to me.

[atsio]

Re: MBX-237 all capacitors shorted

When you say, shorted, how many Ohms?
Remove processor and check resistance to ground without power supply connected on PL16, PL17, PL19, PL8, PL9, PL10, PL14 and PL11

[lefos]

Re: MBX-237 all capacitors shorted

I think that the cpu is soldered in the main board. When you find the shorted one check also on the daughter board for any tiny fuse near the black connectors under those black tapes.

[Journeyman]

Re: MBX-237 all capacitors shorted

Hi guys,

I have a MBX-237 in hands which is shorted almost everywhere (see pic).

Need help where to connect my regulated power supply to inject current and detect shorted capacitor.

Thanks.

did you ever fix this? I am in the same boat here. not sure if the capacitors are shorted or just reading that way due to the circuit?

the laptop won't turn on, but it does charge the battery.

[ktmmotocross]

Re: MBX-237 all capacitors shorted

i bet on bad chip. Northbridge with GPU is pain in ass