Products > Test Equipment

Agilent E7495 linux root account

<< < (90/91) > >>

GRFixedGear:
Regarding the screen protector adhesive... mine came off with IPA and some mild elbow grease. No negative impact on the plastic or the glass/stainless of the screen itself. Planning to replace the adhesive with firm vhb tape 1/8" wide since I measure the old crap at 0.5mm after removal which makes the claimed 0.63mm of that tape variety seem just about perfect.

Aside from fixing that sagging adhesive on the screen it seems I need to get into the guts of mine. It shut down yesterday connected to a ac adapter and now even though it will restart the power consumption is higher and the unit has a magic smoke smell to it. Lost a tantalum like Signal Path did, maybe?

GRFixedGear:
Ouch....
Backside of the primary power board....

GRFixedGear:
I don't have tantalums to use in that spot, but replaced with 2 1206 X7R 10uF 35V ceramics since they run at 24V and I'm trying to counteract the cap loss at that bias voltage. Putting it all back together.

Wallace Gasiewicz:
About PCMCIA Card Readers....... 

Old Win 7 Dell Latitude E 6410 has slot.  I bought one for $50 just for this feature.   

I also use it for my EPROM stuff.
It also has Telnet  (which did not help with the 7495), you can Telnet in but you cannot accomplish the change necessary.

GRFixedGear:
CF worked fine for me. Got a type 2 adapter for an sd card, partitioned a 64GB microSD card for 2GB to make the ancient firmware happy on the device. Put in the upgrade files, popped it in and found my uncle bob.

Working on the patches... GPS patch works a treat, but the published patches for the license file didnt work for me first time. I got a unit that was non-responsive to button pushes, and even lost the soft-key labels / images on the screen when I tried it. Not quite sure how that happened. MAYBE it was just a glitch in the firmware storage in that case. I'll give it another go and see what happens. Worst thing that happens is I remote login and ftp the file back up to my linux box to compare intended contents vs actual in the flash of the 7495a

I've used Ghidra to decompile the elgato binary to understand the patch being applied to the file offset of 0x337a7c appears to be correct. It shows up in a function called "l_good_lic_key". As you can imagine that's  a rather long nested function and not very much fun to read in the assembly or decompiled presentation from Ghidra. The instruction being modified is effectively the first branch in the function, but the suggested edit turns it into a mov/cpy operation from r0 to r0... effectively a nop?! Then the two instructions that follow (seems to have been unused previously so its curious that they are even there) hard codes a 1 return value and jumps to the return at the end of the function. Skips all the gory details in the middle. Genius

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod