Is it practical to replace the radio chip in a Linksys WRT54GS version
2 router. I have acquired two that were fried from running the power set too high. Rest of the router works OK and they are running DD WRT firmware. Setup shows transmit was set to max on both routers.
Try resetting the firmware to defaults before you attack. Miracles are often useful.
The power amp is mostly likely blown. 250mw out will not hurt the power amp at room temperature, but will fry the chip with a high ambient temperature or if air circulation is somehow blocked. At
250mw out, the chip dissipates about 1.5 watts. At 50C/watt, the case will run at: T = 25C + (1.5watts * 40C/watt) = 100C That's rather hot.
I've replaced 2 of these chips with 50% success. The first, I attempted with a soldering iron and solder wick. I trashed the board. The 2nd I did with a hot air soldering iron, which was both easier and worked just fine.
I'm not sure which chip is used in the version 2 hardware. My guess(tm) is a SiGe 252x chip such as:
I have a v2 in my palatial office and can check the chip number if necessary. You'll have to open up your router anyway, so you might as well do the part number research yourself.