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I have the same problem here, this IC is shorted, is made by International Rectifier, it must be a inverter IC the number printed should be a ghost number because I can't find it, maybe BOSE ask IR to put a nonexistent number to block people fix it, the number by the way is P834 HA1M1 here is a photo also, if someone knows about which other number works here let me know please
Hi,I have the Jamo sub 660 and it won't come on,I took it to my technician,and he told me that it has a broken ic,the broblem is that he cannot replace it cause the number on it is scratched,does anyone know what the number is pls! Thanks in advance Joseph
You did not give a model number. If this is an older model Sony, I would be concerned with the audio IC with standby. This IC will be of the TDA-XXXX series. I doubt if you have a problem with power supply. If you can locate the IC mentioned, and read the TDA number, cross reference this in an NTE semi conductor manual. If it does tell you it is an audio IC with standby...replace this IC with the cross reference. Be sure to check any grounds that need resoldered in the same area as the IC mentioned. Thanks for asking and show a few hands of support!
Hi, There are two possible causes for this problem, either AC cord is internally broken or power supply board got defective for some reason. Let me know model number of tv to find out helpful info/ suggest a solution. Thanks.
There is a problem with the convergence circuit. It can be as simple as poor solder connections at the pins of the convergence IC or a defective IC. If you can solder, you can fix this yourself. Please confirm the model number of hte set and I'll provide the part numbers etc. required to resolve this.
Check the mains rectifier ( 4 diode's or 1 block ) for short circuit ,also check the NTC/PTC resistor ,the power FET and power IC,if the last 2 parts are broken then measure al high omhic resistors between 300V and IC.
The I2C message that you get means the Inter IC communication bus on the system board has gone bad. Replacing the IC would not solve the problem.Philips patented this technology to reduce the number of ICs on the systemboard.There would be a physical I2C chip on the motherboard.
You can read about the technology on the post by philips http://www.nxp.com/acrobat_download/applicationnotes/AN10216_1.pdf
I would suggest update the firmware on the board, or try replacing the I2c interface controller chip.