Editing C64 (section)

==Dead C64==
* [https://www.melon64.com/forum/viewtopic.php?t=16537&start=20 this guy scopes]
* [http://tech.guitarsite.de/c64_scope.html Scope on the C64]
* [https://cbm8bit.com/articles/ray-charlsen/article36 Black Screen Guide]
* [https://ist.uwaterloo.ca/~schepers/MJK/bs.old.html Another Black Screen Guide]
* https://www.youtube.com/watch?v=Mn1keRFXX7I
* Test Fuse
* Test for 5 volts on chips
* check +12V on pin 13 of the VIC
* [https://youtu.be/4evTX8oVmFE?t=352 5 volts on userport]
* https://github.com/jamarju/c64_test_tools
* [http://retro64.altervista.org/blog/commodore-64-repair-a-quick-guide-on-the-steps-required-to-fix-it/?doing_wp_cron=1573826672.1456480026245117187500 Commodore 64: how to repair it, step by step]

* [https://www.ebay.com.au/itm/Commodore-64-PLA-906114-01-C64-replacement-PLAnkton/163941920931 Replacement PLA], [https://www.ebay.com.au/itm/PLAnkton-substitute-for-the-C64-PLA-U17-part-no-906114-01-or-251064-01-F03/183384903756?hash=item2ab297904c:g:hl8AAOSwp~9bd3cA local (more expensive)], [https://www.ebay.com.au/itm/Commodore-64-128-SX64-PLA-Replacement-Chip-Ozpla/274078669127 Alternative], [https://www.gamedude.com.au/products/c-64 cheaper from the store]
* [https://www.ebay.com.au/itm/Replacement-Capacitors-and-Regulators-for-the-Commodore-64/173962706845?hash=item2880fc3f9d:g:hNgAAOSwLwBaa2-9 Replacement Capacitors]
* [https://www.youtube.com/watch?v=RSUjcupjCgk #01 "A Change of Heart" — Commodore 64 Black Screen Repair]
* [https://www.youtube.com/user/aphexteknol/videos aphexteknol]
* [https://www.lemon64.com/forum/viewtopic.php?t=72799&highlight=black+screen&start=15 the 250425 board should in fact boot to the familiar blue BASIC screen just fine without U1 and/or U2. (However, with U1 gone, e.g. the keyboard obviously won't work and with U2 gone, e.g. the serial port won't work).]

* [http://www.zimmers.net/anonftp/pub/cbm/documents/chipdata/index.html Chip Data]
* [http://www.6502.org/documents/datasheets/mos/ Datasheets]
===VIC-II===
* [https://www.retroleum.co.uk/c64-chips ] - £23.84 (AUD$45.19)
* [https://www.ebay.com.au/itm/Commodore-64-VIC-II-MOS-8565-R2-PAL-video-chip-5v-TESTED/254327494958?hash=item3b3719992e:g:dzYAAOSwx4xa8rEf Commodore 64 VIC-II MOS 8565 R2 PAL video chip 5v (*TESTED*)!] WRONG CHIP. Also dodgy and more expensive...

===RF Mod===
* [https://www.lemon64.com/forum/viewtopic.php?t=68447&sid=74a423fd109552dd5012120db35dd956 I did this RF mod mod]
* [https://atariage.com/forums/topic/266566-removing-the-rf-modulator-on-a-c64-pal-1983-w-germany-251137-rev-b/ Removing the RF modulator on a C64 (PAL, 1983, W. Germany 251137, Rev B)]

===TODO===
* Black Screen. Pulses monitor/pops when turned on.
* Power supply seems ok (5.18v). Fuse replaced (I managed to blow it while poking around with the multimeter :/)
* Nothing shows up when toggling on and of rapidly (PLA check).
* Disk drive spins up when turning on.
* Load "$",8 does nothing (not sure the disk drive is working, had to replace a capacitor). Tried poke commands to make sound without success.
* <strike>Check VIC-II Vcc is 5v</strike>. pin 40 is 5v
* <strike>you're looking for the RESET line to be grounded for half a second during powerup. Pin 3 of userport.</strike> RST line goes high after half a sec (and stays high)
* No ram chips over heat. Only hotish chip is 6510
* Address lines 0-11, seem to be under 5v but not GND. Except for pin 12, 13, 14, 15 which are 5v.
* Can I use Chroma/Luma on a composite monitor (ie for just black & white image)?

===PLA===
* http://forum.6502.org/viewtopic.php?f=8&t=3465