I tried rmod on a second gridseed today after having it working well on another gridseed for several days. This one already had vmod1 and I was adding 15k. Actual measured numbers were 35.83k + 14.92k = 50.75 tested on board. That is on the high side I know.
I got the clicking noise and tried to redo a few times but couldn't solve it. I'm not good at soldering but thought I did an ok job. Voltage was low on first try 1.3 something. Second try had the voltage at 1.63v. I removed vmod1 but the clicking was still there. You can actually feel the clicking. The first pod I did had a higher value large silver capacitor 16v 330. This pod has 16v 220.
I screwed something up though on one of the later tries. I may have bridged to that 20nf capacitor. It got hot quickly ..... some solder has actually come out from under one of the gc3355 chips on two sides!
These little things are pretty tough. One chip of the five is still working so hopefully I can fix it up.
Summary:
rmod removed, bridge replaced, no clicking sound
It powers up and miner software sees it. cpuminer reports 5 chips and sets the frequency.
Only one chip does any mining and those shares are accepted by pool. (only chip #4 works)
Red light blinks very very slow. It can be off for a long time or on for a long time. This might be caused because only one chip is actually mining.
Solder is visible on two sides of the center Gridchip (one of the mining chips). See photo. It covers four or five pins on one side and maybe three on another side. I did not drop solder there and I know it wasn't there earlier because I took a photo of the new resistor in place before trying it. I think it has come out from under the chip if that is possible. How do I remove that?
I need some advice or suggestions on what to check / what to do so I can try to recover it or at least get a few more chips working. Any help will be greatly appreciated.
I got the clicking noise and tried to redo a few times but couldn't solve it. I'm not good at soldering but thought I did an ok job. Voltage was low on first try 1.3 something. Second try had the voltage at 1.63v. I removed vmod1 but the clicking was still there. You can actually feel the clicking. The first pod I did had a higher value large silver capacitor 16v 330. This pod has 16v 220.
I screwed something up though on one of the later tries. I may have bridged to that 20nf capacitor. It got hot quickly ..... some solder has actually come out from under one of the gc3355 chips on two sides!
These little things are pretty tough. One chip of the five is still working so hopefully I can fix it up.Summary:
rmod removed, bridge replaced, no clicking sound
It powers up and miner software sees it. cpuminer reports 5 chips and sets the frequency.
Only one chip does any mining and those shares are accepted by pool. (only chip #4 works)
Red light blinks very very slow. It can be off for a long time or on for a long time. This might be caused because only one chip is actually mining.
Solder is visible on two sides of the center Gridchip (one of the mining chips). See photo. It covers four or five pins on one side and maybe three on another side. I did not drop solder there and I know it wasn't there earlier because I took a photo of the new resistor in place before trying it. I think it has come out from under the chip if that is possible. How do I remove that?
I need some advice or suggestions on what to check / what to do so I can try to recover it or at least get a few more chips working. Any help will be greatly appreciated.
Wow! That sucks! No one has EVER had this trouble like that with the R52 mod! No One! Not even green-horns!
Shit!This really bugs me! I feel for your loss! 4 good chips ruined by yet another Zig DOH!!! pod killer mod! Are you absolutely sure un-bridging and adding a resistive load to R42 is correct, Zig? Never mind. I strongly suspect - NOT! This clicking problem only started happening after Zig's mod was introduced!
I think that Zig's mod should be killed for now, at least until the actual cause of the clicking which most likely means something permanently serious has happened and your pod is now a paper weight, is discovered. Looks like I have my work cut out for me. Thanks Zig!
Remember, R52 (aka R139-at least he got that right) mod is proven by thousands of mods to work without harming your pod, even if you make a mistake, the worst that happens is your pod stops working until the solder connections are re-done correctly or the mod is reversed. No permanent destruction! Certainly no solder melting hot chips destruction occurs! I think this makes 4 clicking pods now....That's just too many fried pods! DANGER!
Stick with R52 mod. And again, the chances of our pods ever profitably mining SHA again are slim to none and IF the mod ever has to be reversed, it can be done easily by any qualified tech. Even greenhorns can do it in a reasonable amount of time, obviously!