hair straightener pcb repair

[vocal]

anyone has an idea how to test SN8P2722SG please?
by mistake I soldered a wire in to the wrong place and straightener became dead.
I soldered VCC to VDD. there was no visible signs of damage.
so far I replaced bt151 and background light of lcd lits on. however it does not turn on.
I suspect sn8p2722sg to be faulty but no clue how to test it,

 

[KrisBlueNZ]

A hair straightener with an LCD? That's a bit over the top!

Why do you think the SN8P2722SG is faulty?

Start by uploading some photos. Both sides of the board. And mark the place where you soldered the wire incorrectly.

Why were you taking the hair straightener apart in the first place? Was it faulty? What was the fault?

What brand and model is the hair straightener? Have you found any technical information on it?

 

[vocal]

A hair straightener with an LCD? That's a bit over the top!

Why do you think the SN8P2722SG is faulty?

Start by uploading some photos. Both sides of the board. And mark the place where you soldered the wire incorrectly.

Why were you taking the hair straightener apart in the first place? Was it faulty? What was the fault?

What brand and model is the hair straightener? Have you found any technical information on it?

It is remington s-9500
it started switching off by itself. I found snipped wire and decided to replace it. However I messed with soldering point. When I realized it, I resololdered wire but straightener was dead. I messed with the brown wire on the bigger pcb. It should be connected to vdd but I soldered it to mains. So I assumed that bt151 should be faulty. I replaced it and after that I have lcd bacgroud light on but nothing else

 

[vocal]

I soldered thick brown wire on the bigger pcb to one of the mains wires. Brown thick wire goes to the small pcb to pos of 16V capacitor as you can see from the pictures. So basically both sides of capacitor were connected to live or neutral of mains. nothing blew up. no visible damage.

 

[KrisBlueNZ]

I'm afraid I can't find any technical information on the S9500. It's also potentially dangerous, being directly powered from the mains.

It looks like they only cost around USD 40. Definitely not economical to repair.