Sansui HDLCD3700 -- Turns On, No Picture/Sound

[PohTayToez]

When the power button is pushed, the TV status light will come on as normal but there is no other sign of life from the TV. It will also turn off if you push the power again. I have tried hooking something up to it and switching through the inputs but I have not been able to get any sound or video at all (no backlight either).

After some testing I have found that the F1 fuse on the inverter board reads at somewhere between 3 and 20MΩ. I was hoping someone could help me find a replacement part or at least point me in the right direction. I took a closeup picture of the fuse, it is the fourth picture attached to this post. Should I try bypassing the fuse?

Also, the two largest capacitors on the power board are ever so slightly convex on the top. I think it is how they are designed and that they are not bloated but I would like a second opinion (also pictured).

I've also tested the power output going to the inverter. The pins on the power output to the input board are not labeled.

Power to Inverter:
PWR = 0.05v
E_PWR = 3.51v
BLON = 4.62v
GND = 0.01v
VBL = 25.09v

Pictures (Large Format):
Power Board
Input Board
Inverter Board
Inverter Board Close Up 1
Inverter Board Close Up 2

Pictures (Small Format):

[tom66]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

Those capacitors are OK.
Fuse ratings in this datasheet:


"D" = 0.25A

[PohTayToez]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

Thank you. Would it be a bad idea to bypass this fuse or should I wait until I get a replacement?

[tom66]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

Wait for a replacement.

[PohTayToez]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

Welp, replacing the fuse did the trick. Thanks again!

[tom66]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

Great to hear!

[jonesaa]

Re: Sansui HDLCD3700 -- Turns On, No Picture/Sound

I have a similar problem with a Sansui HDLCD3200a the status light comes on as normal but it only displays a couple of vertical white bars otherwise nothing functions. Could this be the F1 fuse as well?