Re: Neovo F-419 no power.
You may have to clean off the flux residue on top of the IC to be able to read, it has to have some kind of printing on top.
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Re: Neovo F-419 no power.
That is the problem their are no numbers on the top of the device. Maybe on the bottom but have to remove it to see.Leave a comment:
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Re: Neovo F-419 no power.
No. Can you read the numbers as printed on the top? I would try new start up first.Leave a comment:
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Re: Neovo F-419 no power.
Do you know the part number for IC U801 ?Leave a comment:
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Re: Neovo F-419 no power.
OK, it is either bad SMPS IC U801 or may be bad electrolytics startup/running cap (the one to the right of the Green main filter cap in the primary side).
https://www.badcaps.net/forum/attach...7&d=1427384387Leave a comment:
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Re: Neovo F-419 no power.
Does anyone have a parts list or schematicLeave a comment:
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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 voltsLeave a comment:
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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.Leave a comment:
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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 ohmLeave a comment:
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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 BOARDLeave a comment:
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Re: Neovo F-419 no power.
Ok everything hooked back up and the power light does not come on when I press power on.Leave a comment:
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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.Leave a comment:
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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.Leave a comment:
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Re: Neovo F-419 no power.
Did you remove the jumper to isolate the inverter circuit from power supply?Leave a comment:
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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.Leave a comment:
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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.Attached FilesLeave a comment:
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Hi, Im having a similar problem with my Acer Nitro 5 AN517 52, took it to repair and they said that the problem was a burned mosfet wich has written on top "I6 GUE 8v1507".
There is written PQB12 on the motherboard right next to it.
Does anyone know if there is soemthing similar I can buy to replace it with?
Seems impossible to find theidentical mosfet online. -
Hello folks
Laptop Asus R520U problem with instaling ssd drive, laptop come with 2.5" hdd drive, but there is slot for ssd (M.2 I think) I put SAMSUNG 500GB SSD 980 Pro M.2 PCI-E NVMe, but can't be recognized in bios or windows
I don't have any other type of ssd to try, maybe the bus is sata3 not pci-e ??
Any info ?? tnx...08-13-2021, 03:07 AM -
I was trying to repair my tv wich previously had a blinking red led 2 times and it kept going. After shorting the sdm the blinking led changed 5 slow blinks and 3 fast ones wich in the service manual meant error 53 / the fusion chip.
After I heated the fusion chip with a hairdryer for 5 minutes it started working perfectly but after a day it stopped this time no led blinks even in sdm mode.
After probing the psu I have 3.49v and for 1 second I have at least 2 12.3v lines active the fusion chip gets warm in that second the led turns on and then the 12v lines start losing power... -
I need bios for toshiba satellite pro r50-b-15j motherboard faebsy2
i have tried this :
but no power
and i tried this
the laptop worked but asked for a password
i have tried many with same motherboard name wich is FAEBSY2 A5A003954010 A but the laptop didnt turn on (no lights, no fan spinning)
i have attached my original bios wich has been corrupted after a windows update (turn on but black screen)
if any have the bios for the exact model name will be great "toshiba satellite pro r50-b-15j"... -
Hello Folks,
i have a HP Elitebook 840 G1 with a locked BIOS and i have bought a CH341a (black PCB). My problem is that the Bios Chip reads 25Q128A 13ECO and i cannot find a profile for this chip in any of the software recommended in the guide threat in this forum. The chip cannot be detected wich i dont find too surprising, but i can read the chip with random other profiles selected.
I have found a post in this forum in wich the user stated he was able to flash this exact chip with the CH341a and the testclip, but unfortunately this user is no longer active. In...
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