MK802 II - Black Screen problems

Forum to discuss the Rikomagic MK802 II Mini PC

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MK802 II - Black Screen problems

Postby a200 » Tue Aug 21, 2012 7:45 pm

Today I have received the brand new MK802 II. Unfortunately I have some problems.

1. when the power connector comes from TV-USB my MK will not boot properly. After the android-logo with red rikomagic.com text, the blue LED goes for short time off and MK start to boot from beginning.

2. when i use power-connector (i tried two different types) without any other USB devices MK starts 3 of 5 times.

3. When i try to plug wifi keyboard MK goes black after about 1 and 120 seconds.

4- when i try to plug a usb-hub MK goes black immediately.

i tested this with two different TVs.

any ideas?
a200
a200
 
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Re: MK802 II - Black Screen problems

Postby evildee » Wed Aug 22, 2012 3:07 pm

Got mine yesterday and am having similar problems. The unit is wired into my 40" Sony bravia, and works for 10-30 minutes if it's taking power from the TV, then goes black. If I try to supply power from a USB plug, it doesn't seem to boot at all, the little blue light comes on, but nothing appears on the screen. The unit feels quite warm when I feel it after it's shut itself down, but not insanely hot.

I did a factory reset, which seems to make it run a little longer, but the weather is cooler today, so it could be that. I'm really hoping this is an issue that can be fixed with a firmware update or a custom ROM.
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Re: MK802 II - Black Screen problems

Postby sehgal.v7 » Wed Aug 22, 2012 8:09 pm

i had same issue first, it kept rebooting but when i plugged into other usb port of tv, it worked, seems like usb power problem, tv port not giving enough power.

i use microsoft keyboard mouse combo, it works fine for me
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Re: MK802 II - Black Screen problems

Postby a200 » Thu Aug 23, 2012 10:17 am

sehgal.v7 wrote:i had same issue first, it kept rebooting but when i plugged into other usb port of tv, it worked, seems like usb power problem, tv port not giving enough power.

Thank you for your answer.

I've tried the following configurations of power supply:

1. TV-USB (2 differently usb-ports)
2. original Samsung charger like this: http://www.akkulieferant.de/shop/picture/samsung/samsung_etaou10ebe_ladegeraet_2.jpg
3. 230V to USB adapter like this: http://www.preisroboter.de/prodCachedImages/e4040849468896/wentronic__46889.png

My problem sounds similar, but I think this is a issue of power-supply of my MK. I think my dealer will send my a new MK802 II and i'll send the old one back to him.

Best wishes,
a200.
a200
 
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Re: MK802 II - Black Screen problems

Postby batrarobin » Sun Sep 23, 2012 12:42 am

You problem could also be this :

https://www.miniand.com/forums/forums/d ... ck-screens

I am also experiencing "blanking" problems, and after reading the above solution, I will try to find an option in my samsung LED series 7 TV that lets me fix the resolution to 1080p at 50hz.
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Re: MK802 II - Black Screen problems

Postby a200 » Mon Sep 24, 2012 10:45 am

thank you. i'll try it today...
a200
 
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Re: MK802 II - Black Screen problems

Postby Frenki » Thu Sep 27, 2012 7:15 am

a200 wrote:
sehgal.v7 wrote:i had same issue first, it kept rebooting but when i plugged into other usb port of tv, it worked, seems like usb power problem, tv port not giving enough power.

Thank you for your answer.

I've tried the following configurations of power supply:

1. TV-USB (2 differently usb-ports)
2. original Samsung charger like this: http://www.akkulieferant.de/shop/picture/samsung/samsung_etaou10ebe_ladegeraet_2.jpg
3. 230V to USB adapter like this: http://www.preisroboter.de/prodCachedImages/e4040849468896/wentronic__46889.png

My problem sounds similar, but I think this is a issue of power-supply of my MK. I think my dealer will send my a new MK802 II and i'll send the old one back to him.

Best wishes,
a200.

it's looks like power cord problem. i tryed at least 5 cords while find one good enough for using wireless mouse with usb flash without resets and shutdowns.
And one more - i use 220-adapter because my tv-usb give not enough power even via good wire..
My wire
Image
Frenki
 
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Re: MK802 II - Black Screen problems

Postby karolosz » Mon Oct 01, 2012 10:02 pm

is it possible that i met shut downe becouse my energy is not enough??


currently i'd tried mk 802 II with sony erricsson charger 5V 850mA , samsung 5V 700mA & USB from notebook- all brings me crash.


I observed :
-that i can leave my mk802 II form 10h without any acction (conected to wi-fi) with no troubles,
-as well that sometimes it goes powed down even if it is quite cold, but lots of app are working
-or app seems be quite high power consumption app

i read that first mk802 were supplied with charger adapter 5V 2000mA - is it a reason of power down? is it a solution buy charger adapter 5V 2A?
karolosz
 
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Re: MK802 II - Black Screen problems

Postby Profete162 » Tue Oct 02, 2012 8:44 am

Hello,

I tried 7 USB cables and 3 220V-5V convertor without any result.

The MK802 II is still booting (rikomagic logo and boot animation), but then a black screen (but there is still a signal)

Is that a similar issue?
Profete162
 
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Re: MK802 II - Black Screen problems

Postby Profete162 » Wed Oct 03, 2012 11:34 am

I have tried today with a 1A 230V adapter and it seems to do the work...

.. But only for a few minutes. After some use, the device goes to black screen!
Profete162
 
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