I'd check voltage, and then be sure the LEDs you put in there can handle it.

LTG : )

You are not talking about the 4 sockets mounted by the spinning disc? Those are just 555 wedges.

If they are PBL led's, sometimes the wire leads on the 555's are not exactly where they should be relative to how a 555 bulb is; I have had to fiddle with the wire leads coming out of them sometimes to get them to make proper contact; and even then have to adjust them occasionally if they get vibrated off the contacts of the wedge sockets.

I replaced mine with flex 555's, and noticed that a couple had been "chopped" off with burnt tips - I guessed that they were hit with the nuts of the underside disc spinning. I know that they are called flashers, but still thought that they were originally just 555's with bulb covers, not flashers.

I was just looking into this. CoinTaker recommended flex's. I might go this route if it works.
Although I havent seen a 161 to buy yet.

I've been using these 9 LED ones from Amazon with no problems. Plus at 1.70 a bulb you can't beat the price.

http://www.amazon.com/gp/product/B0081448E6/ref=oh_details_o03_s00_i00

I have used the following two LEDs from CT:

http://shop.cointaker.com/product.sc?productId=434&categoryId=8

http://shop.cointaker.com/product.sc?productId=1591&categoryId=8

For those four sockets, I prefer the SUPER 906 RED over the FLAT 8 RED FLEX 906. I have also read others having the LEDs ripped off due to the FLEX head getting caught in the motor.

Steve,

Technically they're rated different but they do work. I have them under the disk in my Tron and previously had 906s behind the lightning bolts in AC/DC (now replaced with PinBits lightning bolts), both without issue.