Neovo F-419 no power.

[BobMollie]

Re: Neovo F-419 no power.

Is their any one that can help me trouble shoot my Neovo F419 monitor?

[newtothis]

Re: Neovo F-419 no power.

Oops missed a page of the thread

*** EDITED ***

[selldoor]

Re: Neovo F-419 no power.

I have been checking for fuses but cant see any small ones on the back of the board.
If budm does not come back on I will have a look back at the whole thread tomorrow.

Not sure what you mean about the board layout being different - perhaps small differences? the board number and revision are the same as the OP?
he has posted a schematic in post 1? is it not relevant?



LATER - I see now you mean a different Main board

[selldoor]

Re: Neovo F-419 no power.

can you do the tests mentioned in this post
https://www.badcaps.net/forum/showpo...2&postcount=21

[BobMollie]

Re: Neovo F-419 no power.

All components measure ok. However I measure 6.61 volts across C809 with power to the board and the logic board not connected.

[budm]

Re: Neovo F-419 no power.

OK, lets remove the jumper that feeds the B+ to the inverter circuit to see if the power supply will start up OK without inverter circuit in place.

[BobMollie]

Re: Neovo F-419 no power.

Ok where do I put my meter for this test? I also assume that the logic board is still disconnected.

[budm]

Re: Neovo F-419 no power.

Did you remove the jumper to isolate the inverter circuit from power supply?

[BobMollie]

Re: Neovo F-419 no power.

Ok sorry it took so long to get back to you. Yes the jumper is removed. Now what, nothing happens.

[budm]

Re: Neovo F-419 no power.

OK, hook the logic board to the power supply board and see if you can see the LED power lights when you activate the power switch.

[BobMollie]

Re: Neovo F-419 no power.

Ok everything hooked back up and the power light does not come on when I press power on.

[BobMollie]

Re: Neovo F-419 no power.

Budm are you still their??

[selldoor]

Re: Neovo F-419 no power.

Can you do the tests on U801 in this post
https://www.badcaps.net/forum/showpo...0&postcount=42

NO POWER TO THE BOARD

[BobMollie]

Re: Neovo F-419 no power.

-V to U801 pin 1 = .22 ohm
-V to U801 pin 3 = 1.52 Meg ohm
-V to U801 pin 6 = .62 ohm
R821 to u801 pin 3 = .22 ohm

[selldoor]

Re: Neovo F-419 no power.

And the voltages
https://www.badcaps.net/forum/showpo...9&postcount=44

Dont be fooled by the results he got - start high and work down.

[BobMollie]

Re: Neovo F-419 no power.

-V To U801 pin 1 = 0 volts
-V to U801 pin 3 = 9.033 volts
-V to U801 pin 6 = 0 volts

[selldoor]

Re: Neovo F-419 no power.

What is the part number on U801

[BobMollie]

Re: Neovo F-419 no power.

I do not see a part number on U801

[BobMollie]

Re: Neovo F-419 no power.

Now what?

[BobMollie]

Re: Neovo F-419 no power.

Does anyone have a parts list or schematic