Re: Sceptre 409BV-FHDU8HJ1L02 dead
Is that board more than likely the problem?
Is that board more than likely the problem?
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
well your backlights are turning on, but after 2 seconds they turn off. So either you got a bad inverter board or you have a bad CCFL.CCFL's go, but not that fast.
If you could test the secondary winding on each transformer with your Ohm meter, we could determent which one is bad.Comment
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
Well, the backlight wasn't coming on at all. Initially, after replacing the power board, the tv worked/ But, the next day, I used it and after a short period, the screen went black with just sound. After that, it would just have sound, no image.
I can test the transformer, I just don't know how to. There are 4 pins, can you instruct me on which to get the resistance? pins 1 and 3 have continuity, pin 1 and 4 are separated from everything else it seems.Comment
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
You have absolute no flash of the backlights? You confirmed BLon, that comes from the main board, so it is o.k. So since you haven't got squat as of a backlight, then there must be something wrong on the PSU, not giving juice to the inverter board.
Confirm PSON, BLon, check adj pin, check main filter cap for 390v when tv is on. Measure DC voltage between VBL+ and VBL-, then the rest of the pins of cn5.
If you look at the inverter board is there a inverter controller ic on it?
Have to figure out, if the controller ic is bad, or if the PSU isn't giving any power.Last edited by CapLeaker; 09-04-2016, 07:52 PM.Comment
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Hi all,
As the title suggests, how can I be sure that my EC chip is really dead?
I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.
Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard... -
hello guys,
i need help to repair a edm-033 ps2
history : as always hdmi port and usb ports destroyed after unplugged
after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
so i changed it
now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...
i don't see any projection of liquid metal on pcb.
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Hi guys!
I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
I have a bench PSU and if I try to inject voltage the voltage... -
Hello everyone hope all doing well!
I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there... -
Hello, today I'm working on this lovely MSI Raider GE75 gaming laptop which I bought to flip. Unfortunately, I believe the CPU is toast but I wanted a second opinion before I chucked it into my spare parts bin. I will not have most tools with me today as I'm away from my workbench but I have the basics (a good multimeter, a horrible iron, a solid screwdriver, and my trusty thermal cam). I do not have the original 230w charger, but I have a Dell 180w which was sold with the device and reportedly "worked fine for them".
Specs: I7-10750H, RTX 2060, 32GB RAM (unknown manufacturer)...
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