Motorola v360 power problem - GSM-Forum

kachman · 01-31-2009, 16:07

I received a moto v360. It was not powering on and the owner doesnt know what happened. i saw some mud on the main board so i washed it in spirit. after drying it, it powered on but after switching off and puttin on charger, the phone will not power on. So i heated the component on the board for a few minutes, i tried powering on and it could power on, after putting on usb cable on pc and switching off, the phone will not power on after pressing power button. I left the phone alone for 1 day, i tried pressing power button and it worked, after switch off, on, off, on, off, then it again fails to power on. What could be causing this problem?

juliusorbiso · 02-01-2009, 09:25

may be the processor my friend.try to reheat it slowly.

kachman · 02-01-2009, 13:05

i have already done that several times, but i still have this problem

Hells_Angel443 · 02-01-2009, 22:23

I think the owner dropped it in the puddle of mud.

Forget about the spirit and alcohol, when you suspect a water damage use "JELT".
(it removes oxidizers better then spirit but more expensive).
If you suspect the phone was in the water, put it in alcohol (If you don't have Jelt or other anti-oxidizer).
And then reheat the entire PCB with Steinel-like heat gun and lot's of flux.

350C if it's lead-free, or 290 if it's leaded tin.

****WARNING!!!! Do not heat with steinel glued BGA's!!!*****

For me this technique fixes 70-80% of water damaged phones.

kent · 02-02-2009, 01:25

i agree, put some flux and heat it.

kachman · 02-04-2009, 10:17

Thanks guy, i fixed the phone and its working fine..bt now i have messed the signal...the phone is showing signal but it cant make calls..i have tried flashing but still the same problem...sometimes the signal is showing but sometimes its going off...what component should i fix now? please assist with pictures

kachman · 02-04-2009, 10:36

[quote=Hells_Angel443;4117508]

****WARNING!!!! Do not heat with steinel glued BGA's!!!*****

quote]

bro what does this mean? and what happens if you heat glued BGA

01-31-2009, 16:07	#1 (permalink)
kachman No Life Poster Join Date: May 2006 Location: Zambia Age: 24 Posts: 1,127 Member: 272581 Status: Offline Sonork: 100.1606685 Thanks: 32 Thanked 71 Times in 62 Posts	Motorola v360 power problem I received a moto v360. It was not powering on and the owner doesnt know what happened. i saw some mud on the main board so i washed it in spirit. after drying it, it powered on but after switching off and puttin on charger, the phone will not power on. So i heated the component on the board for a few minutes, i tried powering on and it could power on, after putting on usb cable on pc and switching off, the phone will not power on after pressing power button. I left the phone alone for 1 day, i tried pressing power button and it worked, after switch off, on, off, on, off, then it again fails to power on. What could be causing this problem?

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02-01-2009, 09:25	#2 (permalink)
juliusorbiso Freak Poster Join Date: Oct 2008 Age: 29 Posts: 353 Member: 884522 Status: Offline Sonork: 05261983 Thanks: 58 Thanked 73 Times in 48 Posts	may be the processor my friend.try to reheat it slowly.

02-01-2009, 13:05	#3 (permalink)
kachman No Life Poster Join Date: May 2006 Location: Zambia Age: 24 Posts: 1,127 Member: 272581 Status: Offline Sonork: 100.1606685 Thanks: 32 Thanked 71 Times in 62 Posts	i have already done that several times, but i still have this problem

02-01-2009, 22:23	#4 (permalink)
Hells_Angel443 Major Poster Join Date: Nov 2008 Posts: 46 Member: 905846 Status: Offline Thanks: 15 Thanked 26 Times in 16 Posts	I think the owner dropped it in the puddle of mud. Forget about the spirit and alcohol, when you suspect a water damage use "JELT". (it removes oxidizers better then spirit but more expensive). If you suspect the phone was in the water, put it in alcohol (If you don't have Jelt or other anti-oxidizer). And then reheat the entire PCB with Steinel-like heat gun and lot's of flux. 350C if it's lead-free, or 290 if it's leaded tin. **WARNING!!!! Do not heat with steinel glued BGA's!!!*** For me this technique fixes 70-80% of water damaged phones.

02-02-2009, 01:25	#5 (permalink)
kent Freak Poster Join Date: Nov 2002 Location: www.droidevelopers.com Posts: 314 Member: 17432 Status: Offline Thanks: 38 Thanked 125 Times in 88 Posts	i agree, put some flux and heat it.

02-04-2009, 10:17	#6 (permalink)
kachman No Life Poster Join Date: May 2006 Location: Zambia Age: 24 Posts: 1,127 Member: 272581 Status: Offline Sonork: 100.1606685 Thanks: 32 Thanked 71 Times in 62 Posts	Thanks guy, i fixed the phone and its working fine..bt now i have messed the signal...the phone is showing signal but it cant make calls..i have tried flashing but still the same problem...sometimes the signal is showing but sometimes its going off...what component should i fix now? please assist with pictures

02-04-2009, 10:36	#7 (permalink)
kachman No Life Poster Join Date: May 2006 Location: Zambia Age: 24 Posts: 1,127 Member: 272581 Status: Offline Sonork: 100.1606685 Thanks: 32 Thanked 71 Times in 62 Posts	[quote=Hells_Angel443;4117508] **WARNING!!!! Do not heat with steinel glued BGA's!!!*** quote] bro what does this mean? and what happens if you heat glued BGA