Jasper 256MB Glitch, rebooting several times in a second

[xboxd]

Hello community,
I try to glitch a Jasper 256MB. In the beginning all worked fine, Xell booted, later ggbuild booted also.
Then I noticed that on some boots the fans do start/stop several times in a second and the xbox won't glitch.
After power cycling the xbox does have the reset as it should be after about 5 seconds, but sometimes it happens that it resets as described above.

So I checked all wires, tried several capacitors and so on. With a 270pF capacitor on CPU_PLL_bypass it makes the reset always after 5 seconds but I won't glitch.
Does anyone have the same problem?

I will try another glitch chip, but I don't think this one is faulty.

[xboxd]

Got the problem solved.
It was the glitchchip which was faulty.

Replaced it with an Coolrunner Cmod and it's booting fine within some seconds...