I am trying to fix my Dynex tv. The PSB is new and so is the Control Board, but when I turn it on, I get "please wait..." on screen, then it quickly goes black. I have the back of it off and checking voltages shows 5v standby and 2.5v supply comes on going away/into PSB/Control Board, 24v is present on PSB (getting .4v on most, if not all, backlight lines, 5v to backlight is there also), the control board's heatsink staying hot to the touch, plus the 2.5v going away/into the PSB/Control Board, gives me the impression it is on. What else should I check for?

Hello All,

tl;dr: minimal electronics experience and my first repair, lifted 8 pads off the laptop display LED controller board when attempting a connector replacement, options are attempting pad repair or jump wiring.

Laptop Model: MacBook Pro 15 Mid-2014 Retina, A1398 MGXA2LL/A
eDP Display: Samsung LSN154YL01-A02, assembly sold as Apple part 661-8310
Soldering Equipment: Hakko FX-888D w/ T-18 tips (Chisel, Conical, Bevel types)

I needed to replace the 30-pin I-PEX Cabline connector (labeled J8300 in the Apple 820-3662 mainboard schematics),...

Check power supply for bad(puffy) capacitors. I found 4 1000uf caps bloated. Replaced and all is good again.

This model Dynex DX-40L261A12 tv will not power on. The standby light comes on and the PSU makes a clicking noise when power cord is plugged in. But thats all.

Connection point with power cord plugged in on PSU.

I'm thinking PSU but like other inputs. Thanks in advance.

Xp805:

gnd
gnd
stb
5v---4.8v
5v---4.8v
12v
12v
gnd
bri
sw
gnd
gnd
5v_m
5v_m

If i unplug XP1 on mainboard and jump 5v to stb is will click and you will hear the speakers come on then fade...

I was troubleshooting my Asus A8V motherboard (Socket 939). Finally got everything working except the board would start up as soon as the power switch on the PSU was turned on ie without pushing the motherboard power button. The Onboard sound was crackly so I tried a PCI-slot sound card. This didn't work at all and when I moved it to the lowest PCI slot the board would not boot. I swapped the PSU out and everything worked
fine with the replacement PSU, even though it had less power on the 12V rail.

I took the cover off, no obvious faults. I took time to read the PSU faqs....