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FYI: WHOEVER told you 110 chips can be replaced with 120 chips is wrong.
Easy way at this point to way at this point to see if chips are the problem is to UNSOLDER AND REMOVE BOTH CHIPS. Make sure not shorted connections and power set up---set will function without the chips but look terrible.
Try Suburban Electronics for the correct chips----only safe replacement for them is the 150 chip----stk-392-110 and stk-392-120 are not interchangeable.
The blinking light indicates a short.
LET ME KNOW IF YOU HAVE QUESTIONS AS I HAVE FIXED hundreds OF THESE SETS.
After a BIOS update, if it fails to post, the BIOS update got corrupted. This happens (rarely) and when it does, the only thing that can be done is to remove the BIOS chip and have it burned at a local repair shop (or sent into Toshiba for a replacement). Without the BIOS functioning properly, the computer can do nothing at all. If your BIOS is not on a removable chip, then the computer will have to be sent to Toshiba to have the BIOS replaced.
the bios chip on almost all laptops are intergrated you can not replace them it is usally located between the processor and micro processor most repair shops can not replace them they soldered to the board if you done a bad flash go to www.badflash.com they may be able to help you
TomTom One uses a Linear Technologies chip LTC3455 as a USB/charger power controller. See http://cds.linear.com/docs/Datasheet/3455fc.pdf. This chip is susceptible to high transient voltages that result from resonances created by parasitic inductances and capacitances of the USB/in-car charger cable . Good designs using this chip suggest that a 1 ohm resistance be put in the path of the cable to reduce the Q of the resonance and hence transient voltages. A 6V Zener diode D5 also serves to protect the chip from these transients.
If the Zener diode is blown it is most likely the the LTC3455 chip is gone as well. You can replace the chip which costs £5.00 (located in the shielded portion of the PCB). The recommended Zener Diodes for this chip are either the EDZ5.6B or EDZ6.2B manufactured by ROHM (http://www.rohm.com/products/databook/di/pdf/edz5.6b.pdf or http://www.rohm.com/products/databook/di/pdf/edz6.2b.pdf). These can be used to replace D5. The STMicroeletronics SM2T6V8A can also be used to replace D5 (http://www.st.com/stonline/products/literature/ds/8694/sm2t.pdf). All the Zeners cost a modest £0.22. I hope this is helpful.